chemistry Word Scramble
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Question | Answer |
Matter has mass and it occupies space. Everything around us is composed of matter. It can exist in three states, viz., Solid, Liquid and | Gas |
The International System of Units (SI) was established by the 11 th General Conference on Weights and Measures (GCWM). The GCWM is an inter-governmental treaty organisation created by Metre Convention, which was signed in | Paris (1875) |
In 1789, the ‘Law of Conservation of Mass’ was proposed. It states that matter can neither be created nor destroyed. This law was propounded by | Antoine Lavioisier |
The Solids possess definite shape and volume. The Liquids possess only definite shape and not volume. The Gas have shape and volume as | Indefinite |
The density of a substance is its amount of mass per unit volume. SI units of mass and volum’e are kg and m3 respectively. Hence, SI unit of density is | kgm–3 |
Camphor is purified by a technique in which pure volatile compound is separated from non-volatile impurities under reduced pressure. What is this technique called? | Sublimation |
Oxygen | 49.9 |
Silicon | 26 |
Aluminium | 7.3 |
Iron | 4.1 |
Calcium | 3.2 |
Sodium | 2.3 |
Potassium | 2.2 |
Magnesium | 2.1 |
There are two types of mixtures—Homogeneous and Heterogeneous. Electrolyte of NH3 in air is a homogeneous mixture. Mixture of silica and salt is an example of | Heterogeneous Mixture |
Crystallisation technique is used to obtain pure inorganic compounds. Two processes are involved in distillation vapourisation and condensation. Which technique is used to purify the substances obtained from Earth’s crust? | Fractional Distillation |
Created by:
dhanalakshmi
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