NDA Chemistry 2013/2014 Past Questions

Equal masses of oxygen hydrogen and methane are kept under identical conditions. The ratio of the volume of gases will be ___.

The forces of attraction that exist between non-polar molecules are called ___.

The Law which states that the amount of gas, dissolved in a liquid is proportional to its partial pressure is ___.

The inert gases are __ in water.

The mass of one Avogadro number of helium atom is ___.

The method that cannot be used for removing permanent hardness of water is ___.

The following are the half-lives of four active isotopes. Which one of the following is the most dangerous to handle?

The heat energy produced when the human body metabolizes 1 gram of fat is ___.

The luster of a metal is due to ___.

The number of waves in n x 10th Bolur's orbit are ___.

The graphite rods in the nuclear reactor ___.

The gas used for artificial ripening of green fruit is ___.

The metal used to recover copper from a solution of copper sulphate is ___.

The metallurgical process in which a metal is obtained in a fixed state is called ___.

The number of d-electrons in Fe²⁺ (Z=26) is equal to that of ___.

The Latin word Formica means ant. The name formic acid is derived from Latin word being ___.

The empirical formula of an oxide of nitrogen containing 30.4% nitrogen is (N = 14.0, 0 =16.0)

Indicate which of the following statements is not true as we move from left to right along the periodic table.

In the redox reaction: 2Fe^2e + Cl₂ → 2Fe^3e + 2e

How many grammes of hydrogen gas will be liberated when 6g of magnesium ribbon dissolves in 500cm³ of 6mol/dm³ of hydrochloric acid according to the equation? Mg + 2HCl → MgCl₂ + H₂ (Mg=24, cl=35.5, H=1)

nCH₂=CH₂ ⟶ (-CH₂-CH₂-)_n
The above equation (at 1500atm and 473K with O₂ initiator as catalyst) represents the manufacture of

Dehydration of CH₃CH₂CH₂CH₂OH gives

How many grammes of bromine will saturate 5.20g of but-l-ene-3-yne?
CH₂=CH≡CH + 3Br₂ ⟶ CH₂BrCHBrCBr₂CHBr₂ (C = 12, H = 1, Br = 80)

The best method to separate mixture of hexane (β pt 41.9k) and heptanes (β pt 371.6k) is ___.

In a qualitative analysis, which of these elements: carbon, nitrogen, sulphur, chlorine and hydrogen are detected using silver nitrate?

Which of the following is NOT correct for sigma (σ) bond?

Which of the following organic compounds will dissolve readily in Benzene?

Geometrical isomers are:

The breakdown of large molecules in fuel oil into smaller ones needed in petrol is __.

C₄H₁₀ + 13/2 O₁₂ ⟶ 4CO₂ + 5H₂O
The above equation is a ___.

2,4 - dinitrophemy/hydrazine is a reagent used till testing the presence of ___.

Kipp's apparatus is used for the laboratory preparation of ___.

Tollen reagent is used to differentiate between which pairs of organic compounds?

The solubility of solids increases with an increase in the temperature of solvent. Which of the following salts has its solubility unaffected with a rise in temperature?

In the contact process for the manufacture of sulphuric acid, sulphur trioxide gas is not passed directly in water because

Ammonia is used as a commercial refrigerant because:

9Fe₂O₃ + 2NH₃ → 6Fe₃O₄ + N₂ + 3H₂O According to the balanced equation above, when one mole of NH₃ reacts completely. Which of the following is true?

What is the IUPAC name of the compound whose structure is shown below?
$\table , , H, , CH_3, , H, , ; , , ∣, , ∣, , ∣, ,; H, -, C, -, C, -, C, -, H; , , ∣, , ∣, , ∣, ,; , , H, , CH_3, , H;$

The composition of gunpowder is

The correct arrangement of the petroleum fractions in order of increasing boiling points is