NDA Chemistry 2012/2013 Past Questions

Sieving is a technique used to separate mixtures containing solid particles of___.

Which of the following compounds is composed of Al, Si, O and H?

Calculate the molarity of a solution containing 7.0g of potassium chloride in 1dm³ (K = 39. Cl = 35.5)

In the titration of oxalic acid against sodium hydroxide, the best indicator will be ___.

Hydrogen bomb is based on the principle of ___.

The IUPAC name of coordination compound K³[Fe(CN)⁶] is

The nucleus of an atom consists of ___.

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

Below is a paper chromatogram of a mixture of dyes:

Which dye is least absorbed by the paper?

A hydrocarbon contains 20% by mass of hydrogen. What is its empirical formula?

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

What is the hybridization of the carbon atoms marked with asterisk?
$\table CH_3, -, C, -, CH_3; , , ∣, , ; , , CH_3, , ;$

Which of the following is an aromatic compound?

One of the main points of Dalton's Atomic Theory can be stated as follows:

Which of the following is true?

An increase in concentration of reactants will increase the reaction rate. This can be explained by:

Consider the reaction : N₂O_4(g) (colourless) ↔ 2NO_2(g) (dark brown)
Which one of the following correctly describes what you would see if the pressure was decreased?

The electronic configuration of the aluminium atom is ____.

Which one of the following is not true about chlorine water?

What is the oxidation number of chromium in Potassium Chromate (K₂CrO₄)

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:

Cu_(s) + HNO_3(l) → Cu(NO₃)_2(l) + H₂O_(l) + 2NO_2(g) .
In the above reaction, nitric acid is acting as:

Which of the following salt is used in the preparation of caustic soda, washing soda, hydrochloric acid, bleaching powder etc?

Ammonia is used as a commercial refrigerant because:

If a salt is dissolved in water and the resulting solutions feels cold to the hand. This implies that it is:

Which of the following statements is correct about Osmotic Pressure?

The heat change associated with a given chemical change is always constant and is independent of time and of any intermediate changes involved. This is

Electrovalency is best favoured by:

Which of the following better defines a black body?

What is the advantage of alloying lead with tin?

Which of these ions gives a dark green precipitate with sodium hydroxide solution but a dark blue precipitate with potassium hexacyanoferrate (ii) Solution?

What is the effect of addition of a catalyst on a reversible reaction in a dynamic equilibrium?

Which of these statements is true?

When the trixonitrate (v) salt of an alkali metal M is heated. the formula of the solid product formed is ___.

Chromatograph is used to separate components of mixtures which differ in their rates of ___.

The number of hydrogen ions in 4.9g of tetraoxosulphate (V) acid is
[S= 32, O= 16, H=1] N_A = 6.02 x 10²³]

Which of the following tests will completely identify any one of sulphur (IV) oxide, hydrogen, carbon (IV) oxide and nitrogen (II) oxide?

In the Haber process for the manufacture of ammonia, the catalyst commonly used is finely divided ___.

A metallic oxide which reacts with both HCl and NaOH to give salt and water only can be classified as ___.