Which particular property of cast iron makes it unsuitable for the construction of bridges.
Choose the letter A, B,C or D to match the description given below:
A. Ammonia
B. Hydrogen chloride
C. hydrogen sulphide
D. sulphur dioxide
This gas can be oxidized to sulphur.
Choose the letter A, B,C or D to match the description given below:
A. Ammonia
B. Hydrogen chloride
C. hydrogen sulphide
D. sulphur dioxide
This gas decolourises potassium permanganate solution.
Sulphur dioxide.
Choose the letter A, B,C or D to match the description given below:
A. Ammonia
B. Hydrogen chloride
C. hydrogen sulphide
D. sulphur dioxide
When this gas is bubbled through copper sulphate solution, a deep blue coloured solution is formed.
Choose the letter A, B,C or D to match the description (i) to (vi) given below:
A. Ammonia
B. Hydrogen chloride
C. hydrogen sulphide
D. sulphur dioxide
This gas gives a white precipitate when reacted with silver nitrate solution acidified with dilute nitric acid.
Choose the letter A, B,C or D to match the description given below:
A. Ammonia
B. Hydrogen chloride
C. hydrogen sulphide
D. sulphur dioxide
This gas burns in oxygen with a green flame.
Choose the letter A, B,C or D to match the description given below:
A. Ammonia
B. Hydrogen chloride
C. hydrogen sulphide
D. sulphur dioxide
This gas can be obtained by the reaction between copper and concentrated sulphuric acid.
X, Y and Z are three crystalline solid which is soluble in water and have a common anion to help you to identify X, Y and Z, you are provided with the following experiment observation. Copy and complete the corresponding inferences in (i) to (iv).
Write the equations for the following reaction:
1) X and concentrated sulphuric acid (below 2000C.)
one equation only for either of the cation given in INFERENCE 2.)
2) Action of Heat on Y.
The electronegativities (according to Pauling) of the elements in Period 3 of the Periodic table are as follows with the element arranged in alphabetical order:-
Al | Cl | Mg | Na | P | S | Si |
1.5 | 3.0 | 1.2 | 0.9 | 2.1 | 2.5 | 1.8 |
Choose the word or pharse from the bracket which correctly completes each of the following statement;
1) The element below sodium in the same group would be expected to have a ......................(lower/higher) electronegativity than sodium and the element above chlorine would be expected to have a .......................(lower/higher) ionisation potential than chlorine.
2) On moving from left to right in a given period, the number of shells (remains the same,' increases/decreases).
3) On moving down a group, the number of valence electrons (remains the same/increases/decreases).