Basic Science Test 2

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Basic Science Test 2

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Weekly Quiz Competition

Question 1
1 / -0

Which among the following is an insect?

A

B

C

D
Solution
- Insects are invertebrates, which means they have no backbone.
- They have six legs, antennae, and three parts to their body.
- There are between six and ten million different types of insects. Examples of insects are ants, cockroaches, bees etc.
Question 2
1 / -0

The symbol of SI unit of inductance is $$H$$. It stands for ____.

A
Holm

B
Halogen

C
Henry

D
Hertz

Solution

If a current of 1 ampere flowing through the coil produces flux linkage of 1 weber turn, the coil has a self inductance of 1 henry.‌ Henry (H) is the SI unit of Inductance. It is named after Joseph Henry, an American scientist who discovered electromagnetic induction.
Question 3
1 / -0

Which of these animals can live both on land and in water?

A

B

C

D
Solution
- Frogs are amphibians, which means they can exist on both land and in the water.
- They lay their eggs in the water which hatch and become fish-like creatures called tadpoles. The tadpole will live in the water until it slowly changes into a frog.
Question 4
1 / -0

Match column I with column II and select the correct option from the given codes.
Column I(Units) Column II(Quantities)
(i) Ampere p. Temperature
(ii) Nautical mile q. Electric current
(iii) Kelvin r. Distance at sea
(iv) Ohm s. Energy
(v) Joule t. Resistance

A
(i)-q, (ii)-r, (iii)-p, (iv)-t, (v)-s

B
(i)-p, (ii)-q, (iii)-r, (iv)-s, (v)-t

C
(i)-t, (ii)-s, (iii)-r, (iv)-q, (v)-p

D
(i)-q, (ii)-p, (iii)-s, (iv)-r, (v)-t
Solution
- Ampere is the standard unit of electric current.
- The nautical mile is used for sea or air travel and is defined as 1,852 metres.
- The Kelvin scale is the SI unit of temperature.
- Ohm is the SI unit of resistance.
- Joule is a unit in the SI system which measures energy, usually in scientific or electrical appliances.
Question 5
1 / -0

The properties of substance $$X, Y$$ and $$Z$$ are given as:
$$X :$$ Gas, transparent, colourless
$$Y :$$ Solid, translucent, insulator
$$Z :$$ Liquid, opaque, edible
$$X, Y$$ and $$Z$$ are respectively

A
Water vapour, petrol and mercury

B
Fog, frosted glass and muddy wawter

C
Oxygen, butter paper and milk

D
Chlorine, glass jar and water

Solution

$$X :$$ Oxygen gas is colourless and transparent.
$$Y :$$ Butter paper is solid, translucent and an insulator.
$$Z :$$ Milk is an edible and opaque liquid.
Question 6
1 / -0

Read the following statements carefully and select the option which correctly identifies the true (T) and false (F) statements.
(i) Synthetic fibres are the fibres that are made from chemicals.
(ii) Cashmere wool is obtained from cashmere rabbit.
(iii) Anthrax is an occupational disease caused by a bacteria Bacillus anthracis.

A
T F T

B
F F T

C
T T F

D
F T T

Solution

Cashmere wool is obtained from cashmere goats.

Question 7

1 / -0

Kunal has classified a few processes as shown in the given table:

S. No.	Processes	Type of change
I.	Sublimation of naphthalene balls	Chemical
II.	Heating of sodium with chlorine gas	Physical
III.	Mixing sodium hydroxide with copper sulphate solution	Chemical
IV.	Expansion of bimetallic strip	Chemical
V.	Extraction of a metal by electrolysis	Physical

The processes which are classified incorrectly are

II, IV and V only

III and V only

I, II, IV and V only

All of these

Solution

I. Sublimation of naphthalene balls is a physical change as solid naphthalene changes into its gaseous form.
II. When sodium is heated with chlorine, a new substance, sodium chloride is formed.
$$\underset {Sodium}{Na_{(s)}} + \underset {Chlorine}{\dfrac {1}{2}Cl_{2(g)}}\rightarrow \underset {Sodium\ chloride}{NaCl_{(s)}}$$
Thus, it is a chemical change.
III. When sodium hydroxide is mixed with copper sulphate, copper hydroxide and sodium sulphate are formed.
$$\underset {Sodium\ hydroxide}{NaOH} + \underset {Copper\ sulphate}{CuSO_{4}}\rightarrow \underset {Copper\ hydroxide}{Cu(OH)_{2}} + \underset {Sodium\ sulphate}{Na_{2}SO_{4}}$$.
This is a chemical change as new substances are formed.
IV. Expansion of bimetallic strip is a physical change.
V. Extraction of a metal by electrolysis is a chemical change.

Question 8
1 / -0

Brass gets discoloured in air due to constant exposure in presence of _________________.

A
Aluminium .phosphide

B
Hydrogen suiphide

C
Hydrogenated wafers

D
Aluminium sulphide
Question 9
1 / -0

Who has become the first Indian to be honoured with the Linnean Medal in Botany?

A
Sharachandra Lele

B
Kamalijit Bawa

C
R Siddappa Setty

D
P S Mathur

Solution

Indian botanist Dr. Kamaljit S. Bawa has been conferred with the prestigious Linnean Medal in Botany from the Linnean Society of London on May 24, 2018. He has been recognized for his pioneering research on the evolution of tropical plants, tropical deforestation, non-timber forest products and for decades of work on the biodiversity of forests in Central America, the Western Ghats and the Eastern Himalaya. With this, he became the first Indian to win the award ever since it was first constituted in 1888. Dr. Bawa is the President of Bengaluru-based non-profit Ashoka Trust for Research in Ecology and the Environment (ATREE). The Linnean Medal is awarded to a biologist every year by the Linnean Society of London (the worlds oldest active biological society founded in 1788 and named after famous Swedish biologist Carl Linnaeus who gave us one of the systems of naming plants and animals).
Question 10
1 / -0

A mass m with velocity u strikes a wall normally returns with the same speed. The change in momentum is

A
-mu

B
mu

C
Zero

D
-2mu

Solution

$$\Delta P = -mu = -mu$$
$$= -2mu$$

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Re-Attempt Weekly Quiz Competition

Column I(Units)	Column II(Quantities)
(i) Ampere	p. Temperature
(ii) Nautical mile	q. Electric current
(iii) Kelvin	r. Distance at sea
(iv) Ohm	s. Energy
(v) Joule	t. Resistance

Basic Science Test 2

Result

Basic Science Test 2

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SHARING IS CARING

Question 1

Solution

Question 2

Holm

Halogen

Henry

Hertz

Solution

Question 3

Solution

Question 4

(i)-q, (ii)-r, (iii)-p, (iv)-t, (v)-s

(i)-p, (ii)-q, (iii)-r, (iv)-s, (v)-t

(i)-t, (ii)-s, (iii)-r, (iv)-q, (v)-p

(i)-q, (ii)-p, (iii)-s, (iv)-r, (v)-t

Solution

Question 5

Water vapour, petrol and mercury

Fog, frosted glass and muddy wawter

Oxygen, butter paper and milk

Chlorine, glass jar and water

Solution

Question 6

T F T

F F T

T T F

F T T

Solution

Question 7

II, IV and V only

III and V only

I, II, IV and V only

All of these

Solution

Question 8

Aluminium .phosphide

Hydrogen suiphide

Hydrogenated wafers

Aluminium sulphide

Question 9

Sharachandra Lele

Kamalijit Bawa

R Siddappa Setty

P S Mathur

Solution

Question 10

-mu

mu

Zero

-2mu

Solution

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