The main constituent of Pearls are: ______________...?

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Calcium Carbonate &Megnesium Carbonate

The main constituent of Pearls are: ______________...? Mcqs

PPSC Past Papers

The main constituent of Pearls are: ______________...?

(A) Calcium oxide &Ammonium Chloride (B) Calcium Carbonate &Megnesium Carbonate

(C) Aragonite & Conchiolin (D) None of these

Chemical name of vinegar is _____________...?

(A) Sodium Nitrate (B) Dilute acetic acid

(C) Chloride of lime (D) Calcium

Main constituent in air is ___________...?

(A) Oxygen (B) Nitrogen

(C) Hydrogen (D) Helium

The ‘stone’ formed in human kidney consist mostly of_____________...?

(A) Calcium oxalate (B) Sodium acetate

(C) Magnesium sulphate (D) Calcium

The main Constituent of Biogas is__________...?

(A) Methane (B) Hydrogyn

(C) Oxygen (D) Carbin dioxide

The most abundant constituent in Air is ______...?

(A) Hydrogen (B) Oxygen

(C) Nitrogen (D) Carbon Dioxide

The atmosphere of moon consists of______________...?

(A) 90% Hydrogen, 10% Nitrogen (B) 80%Nitrogen, 20% Hydrogen

(C) 60% Nitrogen, 40%inert gases (D) None

The alpha particles are compact clusters of______________...?

(A) Electron and Proton (B) Two Protons and two Neutrons

(C) Three protons and three Neutrons (D) None

Stars are huge balls of gas mainly consist of _______ and ________...?

(A) Oxygen, Nitrogen (B) Helium, Oxygen

(C) Hydrogen, Helium (D) Nitrogen, Carbon

Earth is closest to the sun every year in early ______________, when it’s winter for the Northern Hemisphere. We’re farthest away from the sun in early __________________, during our Northern Hemisphere summer....?

(A) January – July (B) June – December

(C) July – January (D) December – June

Vitamin C deficiency leads to:____________...?

(A) Scurvy (B) Cold

(C) Cancer (D) Rickets

The chief constituents of gobar gas is_________...?

(A) Methane (B) Oxygen

(C) Hydrogen (D) Carbon monoxide

DNA is _____________...?

(A) Acetic Acid (B) A class of nucleic acids

(C) Citric Acid (D) None of these

The gradual physiological adjustment to slowly changing new environmental conditions is known as _____________________...?

(A) Selection (B) Introduction

(C) Acclimatization (D) Quarantine

Acid deposition causes ______________________...?

(A) the greenhouse effect to lessen (B) lakes and forests to die

(C) acid indigestion in humans (D) all the above are correct

The first organism on earth were _______________...?

(A) autotrophs (B) heterotrophs

(C) saprotrophs (D) none of these

The type of glass used in making lenses and prism is___________...?

(A) Pyrex glass (B) jena glass

(C) Flintglass (D) Soft glass

Most of the ozone in the atmosphere is concentrated in the _____________...?

(A) Mesosphere (B) Troposphere

(C) Stratosphere (D) ionosphere

1 yard =___________...?

(A) 3 feet (B) 6 feet

(C) 2.4 feet (D) 12 feet

Winter Solstice means____________...?

(A) longest night (B) longest day

(C) smallest night (D) smallest day

The main constituent of hemoglobin is___________...?

(A) Chlorine (B) Iron

(C) Calcium (D) None of these

Water vapor is ______________...?

(A) A gas (B) A cloud droplet

(C) A rain drop (D) A snowflake

Garnet is a______________...?

(A) Sedimentary rock (B) Igneous rock

(C) Mineral (D) None of these

The major ingredient of leather is__________________...?

(A) Collagen (B) Polymer

(C) Nucleic acid (D) None of these

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(A) Calcium oxide &Ammonium Chloride

(B) Calcium Carbonate &Megnesium Carbonate

(C) Aragonite & Conchiolin

(D) None of these

(A) Sodium Nitrate

(B) Dilute acetic acid

(C) Chloride of lime

(D) Calcium

(A) Oxygen

(B) Nitrogen

(C) Hydrogen

(D) Helium

(A) Calcium oxalate

(B) Sodium acetate

(C) Magnesium sulphate

(D) Calcium

(A) Methane

(B) Hydrogyn

(C) Oxygen

(D) Carbin dioxide

(A) Hydrogen

(B) Oxygen

(C) Nitrogen

(D) Carbon Dioxide

(A) 90% Hydrogen, 10% Nitrogen

(B) 80%Nitrogen, 20% Hydrogen

(C) 60% Nitrogen, 40%inert gases

(D) None

(A) Electron and Proton

(B) Two Protons and two Neutrons

(C) Three protons and three Neutrons

(D) None

Stars are huge balls of gas mainly consist of _ and __...?

(A) Oxygen, Nitrogen

(B) Helium, Oxygen

(C) Hydrogen, Helium

(D) Nitrogen, Carbon

Earth is closest to the sun every year in early , when it’s winter for the Northern Hemisphere. We’re farthest away from the sun in early ____, during our Northern Hemisphere summer....?

(A) January – July

(B) June – December

(C) July – January

(D) December – June

(A) Scurvy

(B) Cold

(C) Cancer

(D) Rickets

(A) Methane

(B) Oxygen

(C) Hydrogen

(D) Carbon monoxide

(A) Acetic Acid

(B) A class of nucleic acids

(C) Citric Acid

(D) None of these

(A) Selection

(B) Introduction

(C) Acclimatization

(D) Quarantine

(A) the greenhouse effect to lessen

(B) lakes and forests to die

(C) acid indigestion in humans

(D) all the above are correct

(A) autotrophs

(B) heterotrophs

(C) saprotrophs

(D) none of these

(A) Pyrex glass

(B) jena glass

(C) Flintglass

(D) Soft glass

(A) Mesosphere

(B) Troposphere

(C) Stratosphere

(D) ionosphere

(A) 3 feet

(B) 6 feet

(C) 2.4 feet

(D) 12 feet

(A) longest night

(B) longest day

(C) smallest night

(D) smallest day

(A) Chlorine

(B) Iron

(C) Calcium

(D) None of these

(A) A gas

(B) A cloud droplet

(C) A rain drop

(D) A snowflake

(A) Sedimentary rock

(B) Igneous rock

(C) Mineral

(D) None of these

(A) Collagen

(B) Polymer

(C) Nucleic acid

(D) None of these