Who are my companions? Group 'A' Group 'B' 1. Stainless steel (a) Non-metal 2. Silver (b) Compound 3. Bhajani mixture for milling (c) Mixture 4. Salt (d) Element 5. Coal (e) Alloy 6. Hydrogen (f) Metal

1- (e) : Stainless steel is an alloy of iron and several other components such as nickel, chromium. 2- (f) : Silver is a chemical element with atomic number 47 is a metal and is very useful. 3- (c) : Bhajani mixture for milling is a healthy multigrain mixture. 4- (b) : Salt is a combination of sodium and chlorine, both of which are elements. Thus, salt is a compound. 5- (a) : Coal is a non-metal, which is also a combustible solid, used for cooking purposes or to produce electricity. 6- (d) : Hydrogen, an element placed first in the periodic table. It is also the most abundant element found in the universe. Group 'A' Group 'B' 1. Stainless steel (e) Alloy 2. Silver (f) Metal 3. Bhajani mixture for milling (c) Mixture 4. Salt (b) Compound 5. Coal (a) Non-metal 6. Hydrogen (d) Element

E M B I B E

General Science Standard Seven>Chapter 14 - Elements, Compounds and Mixtures>Use your brain power>Q 2

MEDIUM

7th Maharashtra Board

IMPORTANT

Earn 100

Which properties of a liquid are seen in the distillation method?

Important Questions on Elements, Compounds and Mixtures

EASY

7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 14 - Elements, Compounds and Mixtures>Use your brain power>Q 3

For what purposes is distilled water used?

HARD

7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 14 - Elements, Compounds and Mixtures>Exercise>Q 1

Who are my companions?

Group 'A'	Group 'B'
1. Stainless steel	(a) Non-metal
2. Silver	(b) Compound
3. Bhajani mixture for milling	(c) Mixture
4. Salt	(d) Element
5. Coal	(e) Alloy
6. Hydrogen	(f) Metal

HARD

7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 14 - Elements, Compounds and Mixtures>Exercise>Q 2

Write the names of elements from the following symbols.

$Zn, Cd, Xe, Br, Ti, Cu, Fe, Si, Ir, Pt$

HARD

7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 14 - Elements, Compounds and Mixtures>Exercise>Q 3

What are the molecular formulae of the following compounds?
Hydrochloric acid, sulphuric acid, sodium chloride, glucose, methane.

EASY

7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 14 - Elements, Compounds and Mixtures>Exercise>Q 4

Give scientific reason.
Buttermilk is churned to get butter.

MEDIUM

7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 14 - Elements, Compounds and Mixtures>Exercise>Q 4

Give scientific reason.
In chromatography, the ingredients of a mixture rise up to a limited height when water rises up to the upper end of the paper.

MEDIUM

7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 14 - Elements, Compounds and Mixtures>Exercise>Q 4

Give scientific reason.
A wet cloth is wrapped around a water storage container in summer.

MEDIUM

7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 14 - Elements, Compounds and Mixtures>Exercise>Q 5

Explain the difference.
Metals and non-metals.