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Which among, the following is a solid lubricant?

A. carbohydrate

B. graphite

C. protein

D. starch

Correct Answer :

B. graphite


Related Questions

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Name the nematode which lives in lymph vessels of man.

A. Ascaris

B. Hook worm

C. Filarial worm

D. Guinea worm

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The small pox vaccine was discovered by

A. Louis Pasteur

B. Edward Jenner

C. John

D. Harvey

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Niche' refers to

A. place of living

B. type of food

C. place of living and type of food

D. food and movement

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Hormone promoting maleness in flowering plants is

A. Indole Acetic Acid

B. Kinetin

C. Cytokinin

D. Gibberellin

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Milk fever in cows occurs due to lack of

A. Phosphates

B. Calcium

C. Iron

D. Iodine

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Agroecology relates

A. crops and productivity

B. crops and environment

C. crop productivity and physiology

D. crop resistance to climatic changes

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Fishes send out their nitrogenous waste as

A. ammonia

B. urea

C. uric acid

D. sweat

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Which among the following is a Cast growing tree?

A. Teak

B. Eucalyptus

C. Banyan

D. Coconut

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The grouping o( blood is based on substances called

A. antibodies

B. antigens

C. antitoxin

D. enzymes

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Insect pollination is known as

A. Hydrophily

B. Ornithophily

C. Anemophily

D. Entomophily

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Clotting of blood is

A. a chain reaction

B. reversible reaction

C. reflex action

D. no reaction

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The first sign of life made its appearance on the earth about

A. 1 million years ago

B. 500 million years ago

C. 1 billion or 1000 million years ago

D. 3 billion years ago

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Late Blight' is a disease that affects the _______ crop.

A. coconut

B. cashew

C. potato

D. pepper

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Kwashiorkar is characterised by

A. dermatitis, changes in hair pigments and retarded brain growth

B. excretion of creatine in excess

C. tyrosinosis and alcaptonuria

D. None of these

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The country where commercial production of cultured pearls is undertaken on large scale is

A. India

B. Mexico

C. Netherlands

D. Japan

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Which of the following is NOT a viral disease?

A. Chicken-pox

B. Influenza

C. Epilepsy

D. Measles

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The method of inducing artificial immunity was discovered by

A. Jenner

B. Tolstoy

C. Pasteur

D. Morgan

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Which one of the following is not an essential micronutrient for plants?

A. Boron

B. Zinc

C. Sodium

D. Copper

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Maize is attacked by

A. Phytophthora

B. Pythium

C. Ustilago

D. Puccinia

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Insulin is concerned with the metabolism of

A. sugar

B. fats

C. proteins

D. vitamins

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The hypoglossal nerves are the pairs of the spinal nerves

A. First pair

B. Second pair

C. Third pair

D. Fourth pair

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Which organism probably arrived first in the world?

A. Algae

B. Fungi

C. Protozoa

D. None of the above

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Which among the following is a communicable disease?

A. Beri Beri

B. Diabetes

C. Leucoderma

D. Dysentery

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Which among, the following is a solid lubricant?

A. carbohydrate

B. graphite

C. protein

D. starch

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4

Mouth and foot diseases in cattle are caused by

A. Bacteria

B. Virus

C. Fungi

D. Pennicilium

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Lizards, snakes, crocodiles and turtles belong to the class

A. Aves

B. Reptilia

C. Mammalia

D. Amphibia

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The grey matter of the brain is so coloured because of the concentration of

A. nerve cells

B. a pigment

C. nerve fibres

D. melanin

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The metallic part in haemoglobin is

A. Copper

B. Molybdenum

C. Nickel

D. Iron

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Cancer is induced by certain viruses called

A. poxviruses

B. adenoviruses

C. oncogenic viruses

D. herpesviruses

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Sex linked genes are carried by

A. X-chromosomes

B. Y-chromosomes

C. different part of X- and Y-chromosomes

D. autosomes