Question
| Column A | Column B |
| (a) Helium | (1) Electric bulb |
| (b) Neon | (2) Thermometer |
| (c) Argon | (3) Semiconductor |
| (d) Germanium | (4) Weather balloons |
| (e) Mercury | (5) Advertising signboards |
| Column A | Column B |
| (a) Helium | (1) Electric bulb |
| (b) Neon | (2) Thermometer |
| (c) Argon | (3) Semiconductor |
| (d) Germanium | (4) Weather balloons |
| (e) Mercury | (5) Advertising signboards |
| Column A | Answers |
| (a) Helium | (4) Weather balloons |
| (b) Neon | (5) Advertising signboards |
| (c) Argon | (1) Electric bulb |
| (d) Germanium | (3) Semiconductor |
| (e) Mercury | (2) Thermometer |
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| Column A | Column B | ||
| 1 | A metal used for making high quality mirrors . | a | Chlorine |
| 2 | A metal which neither malleable nor ductile. | b | Graphite |
| 3 | A non-metal,used in the sterilsation of water. | c | Iodine |
| 4 | A non-metal, whose deficiency can lead to disease like goitre. | d | Silver |
| 5 | A non -metal which can be used as dry lubricant. | e | Zinc |
| Column A | Column |
| 1. Iron and sulphur do not retain their properties in iron sulphide. | (a) Homogeneous |
| 2. Brass and bronze are two metal-metal mixtures with a special name. | (b) Water |
| 3. The solvent in a sugar solution. | (c) Alloy |
| 4. A mixture whose constituents are mixed uniformly. | (d) Compound |
| Column A | Column B |
| 1. A subatomic particle within the nucleus of an atom having no electric charge. | (a)Atom |
| 2. A negatively charged particle in an atom with a negligible mass. | (b) Neutron |
| 3. The central core of an atom. | (c) Electron |
| 4. The smallest particle of an element, which may or may not have independent existence, but always takes part in a chemical reaction. | (d) Nucleus |
| Column A | Column B |
| 1. Largest Constituent of air, which dilutes the activity of oxygen. | (a) Oxygen |
| 2. A gas used for filling weather observation balloons. | (b) carbon acid |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphur acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (d) Helium |
| 5. A gas vital for respiration. | (e) Nitrogen |
| Column A | Column B |
| 1. An equation in which the numbers of atoms of each element on the side of reactants and the products are not equal. | (a) Hydrogen sulphide |
| 2. The substance which undergo a chemical change during a chemical reaction. | (b) Products |
| 3. The substance which are produced during a chemical reaction. | (c) Reactants |
| 4. A foul smelling gas formed when copper sulphide is treated with hydrochloric acid | (d) Exothermic reaction |
| (e) Unbalanced equation |
| Column A | Column B |
| 1. Zinc | a. calcium sulphate hemihydrate |
| 2. Silver | b. pigment in paints |
| 3. Zinc oxide | c. dentistry |
| 4. Plaster of Paris | d. galvanizing g. dentistry |
| e.laboratory equipment |
| Column A | Column B |
| (a) Evaporation of water | (i) Non-periodic change |
| (b) Milk turning sour | (ii) Periodic change |
| (c) Earthquake | (iii) Chemical change |
| (d) Change of seasons | (iv) Physical change |
| (e) Glowing of bulb | (v) Reversible change |
| Column A | Column B |
| 1. A substance obtained by combining two or more pure substance in a definite ratio. | (a) Distillation |
| 2. Removing soluble solids from their solution in water. | (b) Sedimentation |
| 3. Removing insoluble impurities from muddy water by allowing it to settle. | (c) Compound |
| 4. A process from which pure water is obtained in gulf countries. | (d) Evaporation |
| Column A | Column B |
| 1. Limestone | a. electrical fittings |
| 2. Lead | b. germicide |
| 3. Brass | c. galvanizing |
| 4. Blue vitriol | d. protective shield around nuclear reactors |
| e. calcium carbonate |
1. Force of attraction between the molecules of matter. | (b) Intermolecular force |
2. Spaces in between the molecules of matter. | (d) Intermolecular space |
3. Any material which occupies space and has mass. | (a) Matter |
4. A state of matter which is incompressible. | (c) Liquid |
5. A state of matter which can have any number of free surfaces. | (d) Solid |