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Current Affairs January 2024

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Which of the following is baking soda?

A. Na2CO3 . 10H2O

B. NaHCO3

C. Na2CO3 . H2O

D. NH4CI

Correct Answer :

B. NaHCO3


Related Questions

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A metal which occurs 'free' in nature is

A. gold

B. zinc

C. tin

D. molybdenum

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Stainless steel contains steel and

A. manganese

B. vanadium

C. nickel

D. chromium

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The rate of setting of cement is slowed down by the addition of

A. quicklime

B. gypsum

C. soda lime

D. bleaching powder

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The scientist who synthesised the first organic compound (urea) in the laboratory was

A. Wohler

B. Dalton

C. Lavoisier

D. Fischer

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Chloroform used as anaesthetic should be preserved In the dark in tightly stoppered bottles because otherwise

A. it becomes coloured

B. it gets evaporated in air

C. it gets oxidised to phosgene

D. it gets decomposed to chloropicrin

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The alloy which is extremely hard and resistant to acids is

A. chrome steel

B. silicon steel

C. stainless steel

D. invar

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Hard water does not lather well with soap because

A. it contains carbonates of calcium and magnesium

B. it contains sodium chloride

C. it is highly coloured

D. it contains suspended impurities

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Which of the following is not a food material?

A. silicate

B. protein

C. fat

D. carbohydrate

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The chemical name of aspirin is

A. acetamide phenol

B. malonyl urea

C. aminosalicylic acid

D. acetyl salicylic acid

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Colour blindness is

A. a congenital disease

B. a communicable disease

C. an acquired disease

D. a contagious disease

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Vulcanisation was discovered by

A. Goodyear

B. Wohler

C. Baeyer

D. Perkin

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Graphite la a good conductor of electricity because

A. it is an allotrope of carbon

B. it gives CO2 on heating

C. it contains free electrons

D. it is oxidised to graphitic acid

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Gases have

A. a definite shape but not volume

B. a definite volume and shape

C. a definite volume but not shape

D. neither definite volume nor shape

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Which one of the following elements is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance?

A. Aluminium

B. Chromium

C. Nickel

D. Tungsten

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Mild steel contains

A. iron with very low percentage of carbon

B. iron with high percentage of carbon

C. iron and chromium

D. iron and manganese

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Nitrous oxide used as anaesthetic is usually mixed with

A. ethyl alcohol

B. chloroform

C. oxygen

D. methyl alcohol

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Brass contains

A. copper and tin

B. aluminium and magnesium

C. copper and zinc

D. copper, tin and zinc

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Which among the following is a metalloid?

A. Tin

B. Silver

C. Iodine

D. Arsenic

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Penicillin was discovered by

A. Alexander Fleming

B. Sir JJ Thomson

C. Dr Nessler

D. Sir John Russel

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The compound or nitrogen used in dry cells is

A. ammonia

B. ammonium nitrate

C. ammonium chloride

D. ammonium nitrite

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Beri-beri is caused by deficiency of Vitamin

A. A

B. C

C. B12

D. B1

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On chemical analysis, a bottle cork is found to contain primarily

A. proteins

B. carbohydrates

C. tannins

D. lipids

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The foul odour of gasoline is due to

A. pyridine

B. hydrogen sulphide

C. cacodyl

D. carbylamines

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A metal which is extracted by thermal reduction is

A. nickel

B. aluminium

C. mercury

D. calcium

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Clark's method for removal of temporary hardness in water uses

A. calcium hydroxide

B. washing soda

C. calcium chloride

D. zeolite

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The principle involved in dialysis, a treatment administered to patients with affected kidneys is

A. Cataphoresis

B. Osmosis

C. Dehydration

D. Diffusion

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A mixture of naphthalene and sand is separated by

A. evaporation

B. using a magnet

C. sublimation

D. sedimentation

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The discoverer of chloroform was

A. Liebig

B. Pasteur

C. Bunsen

D. Erlenmeyer

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Iodine in alcohol is known as

A. quick lime

B. tincture iodine

C. rectified spirit

D. None of these

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The ore of iron is

A. Dolomite

B. Magnetite

C. Bauxite

D. Anglesite