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In photoelectric effect, the number of photo electrons emitted per second
depend on

A) Intensity of incident light B) Frequency of incident light
C) Wavelength of incident light D) None of the above

The source of energy of the sun is
A) Compton effect B) Nuclear fission
C) Nuclear fusion D) Photoelectric effect

The process of conversion of alternating current into direct current is known as
A) Oscillation B) Amplification C) Rectification D) Modulation

Which experiment is responsible for finding out the charge of an electron ?
A) Cathode ray discharge tube

B)

C) Rutherford o-ray scattering experiment
D)

Millikan’s oil drop method

None of these

Acetylene molecule has carbon in
A) sp hybridisation B) sp? hybridisation
C) sp°d hybridisation D) ട്രാ hybridisation

Enthalpies of all elements in their standard states are
A) Unity B) Zero
©) <0 D) Different for each element

Identify the Lewis acid among the following.

இ பெ 8) ൨൧0 ©) 873 D) NH
Which of the following is a buffer ?

A) HCl + NaCl B) NaOH + NaCl

C) HCl +KCl D) NH,OH + NH,ClI

In the Lassaigne’s test for Nitrogen in an organic compound, the Prussian blue colour
is obtained due to the formation of

A) K,[Fe(CN)¢] B) Fe,[Fe(CN)g]z 0) Na,[Fe(CN)g] 0) Fe,[Fe(CN)g]