Which of the following can be used to reduce friction between moving parts of machines...? Mcqs

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Which of the following can be used to reduce friction between moving parts of machines...?

(A) Sand
(B) Grease

(C) Gears
(D) Screws

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A person of which of the following blood groups is called a universal donor...?

(A) O
(B) AB

(C) A
(D) B

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A type of circulatory system blood flow through the spaces among tissues called...?

(A) Open type circulatory system
(B) Close type circulatory system

(C) Pulmonary circulatory system
(D) All of these

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Which of the following protects the body against infectious disease and foreign invaders...?

(A) Leukocytes
(B) Red blood cells

(C) Endoplasmic reticulum (ER)
(D) Golgi apparatus

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The good sources of Vitamin-C are________...?

(A) green leafy vegetables
(B) seeds

(C) fresh vegetables and fruits
(D) sea foods

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The chemical used as a fixer in photography is__________...?

(A) sodium sulphate
(B) borax

(C) sodium thiosulphate
(D) ammonium sulphate

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Carbohydrates which digested quickly are called...?

(A) Starch
(B) Protein

(C) Mineral
(D) Vitamin

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The carbohydrates which contain the aldehyde group are called...?

(A) Saccharides
(B) Ketoses

(C) Pentoses
(D) Aldoses

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Dioptre is a unit of measurement for __________ ...?

(A) Current
(B) Lens

(C) Force
(D) Focal Length

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According to Mosely the chemical properties of elements are the periodic function of their...?

(A) Atomic Size
(B) Atomic Mass

(C) Atomic Radius
(D) Atomic Number

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