Which one of the following is the standard for atomic mass?

(a)

₁H¹

(b)

₆C¹²

(c)

₆C¹⁴

(d)

₈O¹⁶

Consider the following statements
1. \(\lambda\) = h / mv is valid only when the particle travels at speed much less than the speed of light.
2. Einstein's mass-energy relationship is E = mc²
3. The angular momentum (mvr) ofthe electron must be equal to an integral multiple of h/4\(\pi\) . Which of the following statements) given above is/ are correct?

(a)

1&3 

(b)

Only 1

(c)

1 & 2

(d)

1, 2 & 3

Assertion: Helium has the highest value of ionization energy among all the elements known
Reason: Helium has the highest value of electron affinity among all the elements known.
Codes:
(a) Both assertion and reason are true and reason is correct explanation for the assertion.
(b) Both assertion and reason are true but the reason is not the correct explanation for the assertion
(c) Assertion is true and the reason is false
(d) Both assertion and the reason are false

(a)

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

(b)

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

(c)

Assertion is true and the reason is false

(d)

Both assertion and the reason are false

Which of the following statements are correct?
(i) Helium has the highest first ionisation enthalpy
(ii) Chlorine has less electron affinity than fluorine
(iii) Ne has more ionisation energy than Boron.
(iv) The ionisation energy noble gases of zero

(a)

(i), (ii) and (iii)

(b)

(i) and (iii)

(c)

(i), (iii) and (iv)

(d)

(i), (ii), (iii) and (iv)

Which one of the following is the first transition series?

(a)

Sc

(b)

Zn

(c)

Ti

(d)

Cu

Consider the following statements.
(i) Oxidation character increases from left to right in a period.
(ii) Reducing character increases from left to right in a period.
(iii) Metallic character increases from left to right in a period.
Which of the above statement is/are not correct?

(a)

(i) only

(b)

(i) and (ii)

(c)

(ii) and (iii)

(d)

(i),(ii),(iii)

Which one of the following is in solid state at room temperature?

(a)

Bromine

(b)

Mercury

(c)

Bismuth

(d)

Gallium

Which one of the following is not an isoelectronic ion?

(a)

Na⁺

(b)

Mg²⁺

(c)

Cl^-

(d)

O^2-

Which of the following have the highest value of electronegativity?

(a)

Halogens

(b)

Alkali metals

(c)

Alkaline earth metals

(d)

Transition metals

Which of the following statements related to the modern periodic table is incorrect?

(a)

The p-block has 6 columns, because a maximum of 6 electrons can occupy all the orbitals in a p-subshell.

(b)

The d-block has 8 columns, because a maximum of 8 electrons can occupy all the orbitals in a d-subshell.

(c)

Each block contairis a number of columns equal to the number of electrons that can occupy that subshell.

(d)

The block indicates value of azimuthal quantum number (1) for the last subshell that received electrons in building up the electronic configuration.

Which of the following is arranged in order of increasing radius?

(a)

K⁺ _(aq) < Na⁺ _(aq) < Li⁺ _(aq)

(b)

K⁺ _(aq) > Na⁺ _(aq) > Zn⁺ _(aq)

(c)

K⁺ _(aq) > Li⁺ _(aq) > Na⁺ _(aq)

(d)

Li⁺ _(aq) < Na⁺ _(aq) < K⁺ _(aq)

The first ionization enthalpy of Na, Mg, AI and Si are in order __________

(a)

NaSi

(b)

Na>Mg>AI>Si

(c)

Na

(d)

Na>Mg>Al

H₂O₂ is a ________ acid.

(a)

mono basic

(b)

di basic

(c)

tri basic

(d)

none

The reaction H₂O₂ ➝ H₂O + O₂ represents, ____________.

(a)

Oxidation of H₂O₂

(b)

reduction of H₂O

(c)

disproponation of oxygen

(d)

acidic nature of H₂O₂

The element which does not contain a neutron is _____________

(a)

hydrogen

(b)

helium

(c)

chlorine

(d)

none of the above

CO₂ + K₂CO₃ + H₂O \(\rightarrow\) X. The product X is ______________

(a)

KHCO₃

(b)

CO₂

(c)

H₂CO₃

(d)

KOH

When sodium peroxide is treated with dilute sulphuric acid the products are _____________

(a)

sodium sulphate and water

(b)

sodium sulphate and oxygen

(c)

sodium sulphate, hydrogen and oxygen

(d)

sodium sulphate and hydrogen peroxide

Which one of the following element mostly present in the sun and the stars?

(a)

Hydrogen

(b)

Lithium

(c)

Helium

(d)

Beryllium

Which one of the following does not have intramolecular hydrogen bonding?

(a)

water

(b)

o-nitrophenol

(c)

Salicylaldehyde

(d)

Salicylic acid

Which of the following is named as perhydrol and used as an antiseptic?

(a)

D₂O

(b)

H₂O₂

(c)

NaH

(d)

B₂H₆

The general electronic configuration of alkali metals is ____________

(a)

[noble gas] ns²

(b)

[noble gas] ns¹

(c)

ns² np⁶

(d)

ns² (n-1)d^1-10

According to VSEPR theory, the repulsion between different parts of electrons obey the order.

(a)

l.p – l.p > b.p – b.p > l.p – b.p

(b)

b.p–b.p> b.p–l.p> l.p–b.p

(c)

l.p–l.p> b.p–l.p > b.p–b.p

(d)

b.p–b.p> l.p–l.p> b.p–l.p

The IUPAC name of the compound CH₃ – CH = CH – C ≡ CH is _________

(a)

Pent - 4 - yn-2-ene

(b)

Pent -3-en-l-yne

(c)

pent – 2– en – 4 – yne

(d)

Pent – 1 – yn –3 –ene

Ortho and para-nitro phenol can be separated by _________

(a)

azeotropic distillation

(b)

destructive distillation

(c)

steam distillation

(d)

cannot be separated

The most easily hydrolysed molecule under SN¹ condition is ___________

(a)

allyl chloride

(b)

ethyl chloride

(c)

ispropylchloride

(d)

benzyl chloride