Identify the correct statement(s) with respect to the following reaction :
Zn + 2HCl \(\longrightarrow\) ZnCl₂ + H₂
(i) Zinc is acting as an oxidant
(ii) Chlorine is acting as a reductant
(iii) Hydrogen is not acting as an oxidant
(iv) Zn is acting as a reductant

(a)

only (ii)

(b)

only (iv)

(c)

both (ii) and (iii)

(d)

both (ii) and (i)

The number of nodes in s orbital of any energy level is equal to _________

(a)

n

(b)

2n²

(c)

n-1

(d)

n-2

Which one of the quantum number is used to calculate the angular momentum of an atom?

(a)

n

(b)

m

(c)

l

(d)

s

Pick the incorrect statement about the factors affecting ionization energy

(a)

More is the shielding of valence electrons more is the ionization energy

(b)

Ionization enthalpy ∝ effective nuclear charge

(c)

Half filled or full filled atomic orbitals have high ionization energy

(d)

Larger is the atomic radii lower is ionization energy

What is the electronic configuration of the elements of group 14?

(a)

ns² np⁴

(b)

ns² np⁶

(c)

ns² np²

(d)

ns²

In chelating method of softening of hard water_______________ is used

(a)

magnesia

(b)

lime

(c)

EDTA

(d)

washing soda

Assertion : The fluorides of alkaline earth metals are almost insoluble in water.
Reason : The lattice energies of the fluorides of alkaline earth metal are very high.
Codes:
a) both assertion and reason are true and reason is the correct explanation of assertion
b) both assertion and reason are true but reason is not the correct explanation of assertion
c) assertion is true but reason is false
d) both assertion and reason are false

(a)

Both assertion and reason are true and reason is the correct explanation for assertion.

(b)

Both assertion and reason are true but reason is not the correct explanation for assertion

(c)

Assertion is true but reason are false.

(d)

Both assertion and reason are false.

Consider the following statements.
(i) 99% of body calcium is present in bones and teeth
(ii) The calcium concentration in plasma is regulated at 10 mg L^-1.
(iii) Calcium plays an important role in neuromuscular function, interneuronal transmission and in blood coagulation.
Which of the above statements is/are not correct?

(a)

(i) only

(b)

(ii) only

(c)

(iii) only

(d)

(i), (ii) and (iii)

Equal volumes of He, O₂ and SO₂ are taken in a closed container. The ratio of the partial pressures of gases He, O₂ and SO₂ would be __________

(a)

1 : 2 : 8

(b)

8 : 16 : 1

(c)

1 : 4 : 16

(d)

16 : 2 :1

Pick out the true statement(s).
(i) q and ware path functions
(ii) q + w is a state function

(a)

Only (i)

(b)

Only (ii)

(c)

Both (i) and (ii)

(d)

Both are incorrect statements