The speed of a sound wave is determined by:

The velocity of sound in any gas depends upon

Which of the following phenomenon cannot take place with sound wave?

Sound wave is an example of

Audible waves have a frequency

In a stationary wave the strain is_________

The colour of a star is changing from blue to red. This indicates that the star is_______

Doppler shift in wavelength is 4A° when a star is moving towards earth with a velocity 4×10⁵ m/s. Wavelength of light emitted by star is________

Frequency of a source moving towards object is 4 × 10¹⁴ Hz with a velocity 1.2 × 10⁷ m/s Doppler shift in frequency is_________

Doppler's effect is not applicable when the speed of the source of sound is

Pure constructive interference occurs between two waves when they have the same _____.

What is the fundamental frequency of an open-pipe resonator?

With the increase in temperature, the frequency of the sound from an organ pipe

The frequency of the note produced by plucking a given string increases as

Energy is to be carried from one place to another. Which one of the following cannot be used?

A resonating column of air contains

String is in fundamental mode of vibration then velocity is directly proportional to

Which one of the following factors determines the pitch of a sound?

In simple harmonic motion: 

In sound waves during the compressions

In the diagram below, the interval PQ represents: 

The length of a string is 1m, tension in it is 40N and mass of the string is 0.1 kg. Then the velocity of transverse waves produced in the string will be:

A plane produces a sonic boom only when

The velocity of sound in air is 330 m/s. The fundamental frequency of an organ pipe open at both ends and length 0.3 m will be.

A stretched string resonates with fundamental frequency of 50 Hz. The wavelength for its 3rd overtone is if speed of transverse wave in the string is 100 m/s.

The correct graph for restoring force and displacement in S.H.M is

For undersea communication which waves are specially preferable:

The vo and vt are speeds of sound in a gas at 0oCand toC then is _________

The wavelength of a sound at room temperature made from a tuning fork of frequency 340 Hz is nearly. 

Time period of simple pendulum is 4 seconds, if its length is increased by 4 times, then its period become?

A particle is performing simple harmonic motion with amplitude A and angular velocity . The ratio of maximum velocity to maximum acceleration is

An observer on the sea shore observes 54 waves reaching the coast per minute. If the wavelength is 10 m. The velocity is

In strings, the position of antinodes is obtained at

The displacement of a body performing S.H.M is x = 0.25 cost , the amplitude of motion will be

If a source is moving towards the stationary observer with speed us the ratio of   and   of the emitted sound is 

A S.H.M has period of 0.01s an amplitude 0.2m velocity at mean position is 

The first resonance length in a closed pipe is 20 cm then second resonance occurs at 

An object attached to one end of a spring makes 20 complete oscillations in 10 s. Its period is:

A sinusoidal wave is traveling toward the right as shown. Which letter correctly labels the amplitude of the wave?

Transverse waves can travel through

A whistle giving out 450Hz approaches a stationary observer at a speed of 33m/s. The frequency heard by the observer in Hz is (speed of sound = 330m/s).

If the number of loops of a stationary wave are increasing then 

Sound travels a distance of 80 m in 40 vibration of turning fork, what is its wavelength

When a wave moves through 10m, a point changes from crest to trough and time taken is 1s then wavelength of wave and its frequency are

The wavelength of wave is 1m and period is 2sec. It waves speed is

The frequency of waves is 200 Hz, If tension is increased 4 time its frequency will be 

When a string of mass ‘m’ per unit length is stretched by a force ‘T’, its frequency is given by

The amplitude of a vibrating body is ‘A’. Distance covered by it in 2.5 vibrations is:

In open organ pipe, if fundamental frequency is f then the other frequencies are        

A string vibrates in 1 loop has frequency 25 Hz. If it moves in 2 loops its frequency would be  

In , the yield of product will be minimum if  

When 1 mole of HCl is added to 1 molar aqueous solution of H₂S then 

Correct optimum conditions for synthesis of ammonia by Haber process

In which case, decrease of pressure favours forward reaction

For above reaction if Kc is 0.25, then Kp for this reaction will be

Half-life of the reaction becomes half when initial concentrations of reactants are doubled. The order of the reaction will be

Solubility product of a salt AB is 0.25 mol² / dm⁶, what will be its solubility (mol/dm³) 

Rate of first order reaction depends on ______  

Arrhenius equation describes the effect of 

The rate expression of a reaction is, Rate = k[A][B] ² What happens to rate of reaction if concentrations of A and B are doubled?   

For endothermic reaction, Ea is activation energy in kJ/mol. The maximum value of enthalpy of reaction (ΔH) will be

For which of the following reactions Kp > Kc 

A buffer is prepared by mixing the solutions of equimolar acetic acid and sodium acetate. The pH should be equal to   

Difference of energy between reactants and transition state is called

The mechanism below has been proposed for the reaction of CHCl ₃ with Cl ₂Step l:             Cl₄(g) 2Cl(g)                                              fast
Step 2:            Cl(g) + CHCl₃(g)CCl₃(g) + HCl(g)            slow
Step 3:            CCl₃(g) + Cl(g) CCl₄(g)                            fast vRate law for the reaction is

All are correct about zero order except

One of the following is not a physical method for determination of rate of reaction

1.0g mole of ethyl alcohol and 1.0g mole of acetic acid are mixed. At equilibrium 0.666g mole of the ester is present. The value of equilibrium constant is

Consider a reaction .Correct relation between Kp and Kc is  

Appropriate units of Kp for the following reaction is    2SO₃ 2SO₂ + O₂

For third order reaction, rate constant has units

Catalyst can change 

pH of buffer in which concentrations of salt and base are 0.1M and 0.01M respectively (pKb = 4.0)

Equilibrium position is shifted backward by increasing temperature in all except

Ksp for following can be written as PbCl₄ Pb⁺² + 2Cl^-1

For solubility product of solutions, solubility of salt may be equal to or less than

Which will change for first order reaction with time

Rate of exothermic reaction is increased by increasing all except

Half-life of certain reaction decreases with decrease in concentration. Order of reaction is 

Following is an exothermic reaction. Which is correct statement? 

For the gas phase reaction  yield of Z at equilibrium could be increased by

If the value of the Kc is larger then it shows that the products are:

NH₃ is purified using condensation method at

For a reversible reaction, the catalyst increases the speed of 

If the equilibrium constant KC valuefor a certain reaction is very small, then:

Choose the one which is not the assumption of collision theory of reaction rate

Which one of the following factors does not affect the equilibrium position?

For the first order reaction, half-life is related to the expression k=0.693 Half life is the

The pKa values of CH₃COOH is 4.74, the pH of equimolar solution of acetic acid and sodium acetate is:

If energy of activated complex is close to energy of reactants, it means that the reaction is  

Ag ₂ (CrO₄) is sparingly soluble having solubility value 3.2 × 10 ^-5. What will be its solubility

The rate of reaction involving ions can be studied by method

In a reaction, A + B → Product, rate is doubled when the concentration of B is doubled, and rate increases by a factor of 8 when the concentrations of both the reactants A and B. are doubled, rate law for the reaction can be written as

When the change in concentration is 6×10 ^-5 moldm ^-3 and time for that change is 100 seconds, the rate of reaction will be

The rate law for the reaction is rate = k[A] ^2/3 . The order of reaction is

In the given it is observed on quadrupling the conc. of B, rate is increases 16times. The order of reaction with respect to B is 

The rate of chemical reaction roughly doubles for every 10^°C rise of temperature. If temperature is raised by 20^°C, the rate may become

Which of the followings is pseudo first order reaction 

In a reaction 2X + Y M + N If the concentration of Y kept constant and that of X is trippled. The rate of reaction will

At equilibrium 0.20 mole of X, 0.45 mole of Y and 0.15 mole of Z are present, Calculate Kc

Which of the following is an exception to the postulates of cell theory?

Viruses were extracted in pure form and crystallized by:

In which of these characteristics, viruses resemble living organisms?

Structurally, complete and mature viral particle is known as:

The capsid of virus is synthesized by/on:

Which one is a cell-encoded protein formed in response to infection with most animal viruses?

Which of the following is true of viruses?

Which of the following is present in both viruses and eukaryotic cells?

Restriction endonucleases are natural enzymes of bacteria which they use for their protection against:

Polio virus can be identified by its:

HIV particles are surrounded by a coat called viral envelope. It is composed of:

In the structure of HIV, gp120 is responsible for the formation of:

HIV RNA is converted to HIV DNA  by reverse transcriptase. This process takes place in/on:

Enveloped virus infects/enters the host cell through:

It is wide spread disease in man caused by RNA enveloped virus and occurs in epidemic form:

It is an RNA non-enveloped virus: 

Vaccination is not available for:

A structural component found in all viruses is:

Viruses that contain two complete copies of positive strand RNA and the enzyme reverse transcriptase are:

Identify the hepatitis virus, which cannot survive independently and it requires another hepatitis virus for its multiplication:

_____________ of HIV stick to the CD4 receptor of the host cell.

On the basis of rRNA, bacteria are divided into:

Edward Jenner introduced:

Which of the glands is often referred in relation with AIDS?

AIDS spread through:

The term ‘animalcules’ was used for bacteria by:

In Gram staining, the iodine solution is used as:

Mycoplasma resemble bacteria in their:

Which of the following is not a bacterial disease?

Comma shaped bacteria are known as:

Pili in bacteria represent: