4th and 5th period in periodic table are known as...? Mcqs

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4th and 5th period in periodic table are known as...?

(A) Short period
(B) Long period

(C) Normal period
(D) Very long period

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Water is a good solvent of ionic salts because:...?

(A) It has a high specific heat
(B) It has no colour

(C) It has a high dipole moment
(D) None of these

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The group containing only electromagnetic waves is ______...?

(A) Light waves, Radio waves, Microwaves
(B) Light waves, Radio waves, Sound waves

(C) Light waves, Sound waves, Microwaves
(D) Radio waves, Sound waves, Microwaves

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The person who inhales cigarette smoke indirectly is known as...?

(A) Active smoker
(B) Passive smoker

(C) Chain smoker
(D) Social smoker

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Which mineral builds red blood cells and it is also involved in the building of bones...?

(A) Magnesium
(B) Sodium

(C) Copper
(D) Iodine

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Approximate age of moon is _________...?

(A) 4.51 billion years
(B) 4.55 billion years

(C) 4.53 billion years
(D) 4.57 billion years

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What is the main component of bones and teeth...?

(A) Calcium carbonate
(B) Calcium phosphate

(C) Calcium sulphate
(D) Calcium nitrate

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Role of biotechnology in the production of food based on ___________...?

(A) Decomposition
(B) Respiration

(C) Digestion
(D) Fermentation

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Objects that gives out light of their own are said to be...?

(A) Luminous
(B) Non-luminous

(C) Reflective
(D) Illuminated

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Some objects from the Kuiper belt are classified as “plutoids” and include...?

(A) Pluto, Cris, and Yeres
(B) Pluto, Bris, and Teres

(C) Pluto, Eris, and Ceres
(D) Yeres, Teres, Ceres

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