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Daily Life Chemistry
Identify the type of reaction :- N2(g) + 3H2(g)→2NH3(g)

a) Combination reaction
b) Displacement reaction
c) Decomposition reaction
d)  Synthesis reaction



Answer
Correct Answer Is : Combination reaction
Solution Is :
Identify the type of reaction :- 2KNO3 (s) → 2KNO2(s) + O2(g)

a) Decomposition reaction
b) Double displacement reaction
c) Acid-base reaction
d) Combination reaction



Answer
Correct Answer Is : Decomposition reaction
Solution Is :
Number of angular nodes for 4d orbital is

a) 4
b) 3
c) 2
d) 1



Answer
Correct Answer Is : 2
Solution Is :
Orbital angular momentum depends on

a) L
b) N and l
c) M and s
d) N and m



Answer
Correct Answer Is : L
Solution Is :
Calculate the energy of one mole of photons of radiation whose frequency is 5 * 1014HZ.

a) 209.1 KJ mol-1
b) 199.51 KJ mol-1
c) 600.176 KJ mol-1
d) 270.1 KJ mol-1



Answer
Correct Answer Is : 199.51 KJ mol-1
Solution Is :
The frequency of the solid yellow line in the spectrum of sodium is 5.09 * 1014s-1. Calculate the wavelength of this light in nanometres.

a) 431 nm
b) 589 nm
c) 714 nm
d) 375 nm



Answer
Correct Answer Is : 589 nm
Solution Is :
Name two most abundant non-metals in earth crust.

a) Oxygen, silicon
b) Dihydrogen , silicon
c) Aluminum , sodium
d) Titanium , oxygen



Answer
Correct Answer Is : Dihydrogen , silicon
Solution Is :
The general electronic configuration of noble gases.

a) Ns6 np6
b) Ds6 np6
c) Ns6 np61
d) Ns6 n6



Answer
Correct Answer Is : Ns6 np6
Solution Is :
The elements in which electrons are progressively filled in 4f-orbital are called

a) Halogens
b) Transition elements
c) Actinoids
d) Lanthanoids



Answer
Correct Answer Is : Lanthanoids
Solution Is :
Ionic radii vary in

a) Inverse proportion to the effective nuclear charge.
b) Inverse proportion to the square of effective nuclear charge.
c) proportion to the square screening effect.
d) Direct proportion to the square of `screening effect.



Answer
Correct Answer Is : Inverse proportion to the effective nuclear charge.
Solution Is :

Preparation for Exams