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Question 3815

In coriander the useful parts are:

Aroots &leaves

Bleaves & flowers

Cleaves & dried fruits

Dflower& dried fruits

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C. leaves & dried fruitsExplanation: Coriander (Coriandrum sativum) is a herb belonging to the family Apiaceae. The leaves are used as a fresh herb (commonly known as cilantro), and the dried fruits (often referred to as coriander seeds) are used as a spice. The fruits contain essential oils like linalool and borneol, which give coriander its characteristic aroma and flavor. Uses: Leaves — used in cooking for flavoring and garnishing dishes. Dried fruits (seeds) — used as a spice, in curry powders, and for medicinal purposes (digestive aid).

Question 3814

Which of the following minerals is found in Monazite sand ?

Apotassium

Buranium

CThorium

Dsodium

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C. ThoriumExplanation not yet available.

Question 3813

Who invented vaccination for 'small pox'?

ASir Fredrick Grant Banting

BSir Alexander Fleming

CEdward Jenner

DLouis Pasteur

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C. Edward JennerExplanation: Edward Jenner, an English physician, is known as the “Father of Immunology.” In 1796, he observed that milkmaids who had previously suffered from cowpox (a mild disease) did not contract smallpox (a deadly viral disease). He tested his hypothesis by injecting a boy with material taken from a cowpox sore and later exposing him to smallpox — the boy did not develop the disease. This led to the development of the first vaccine, derived from the Latin word vacca meaning “cow.” Significance: Jenner’s discovery laid the foundation of modern immunology and preventive medicine. Smallpox was officially declared eradicated by the WHO in 1980.

Question 3812

The optimum dissolved oxygen level (in mg/litre) required for survival of aquatic organism is:

A4-6

B2-4

C8-10

D12-16

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A. 4-6Explanation: Dissolved oxygen (DO) is the amount of oxygen available in water for aquatic organisms to breathe. For the healthy survival of most aquatic life, the DO level should be between 4 and 6 mg/L. Levels below 3 mg/L can lead to stress or suffocation, especially for fish and aerobic microorganisms. Higher DO levels are typical of clean, cold, and well-aerated waters, while polluted or stagnant waters often have lower oxygen levels due to organic decay. Factors Affecting DO Levels: Temperature (higher temperature = lower DO) Organic pollution and bacterial activity Photosynthesis by aquatic plants and algae Water turbulence and aeration

Question 3811

Iodoform is used as an:

Aantipyretic

Banalgesic

Cantiseptic

Danaesthetic

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C. antisepticExplanation not yet available.

Question 3810

White lung disease is prevalent among the workers of:

Apaper industry

Bcement industry

Ccotton industry

Dpesticide industry

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B. cement industryExplanation: White lung disease, scientifically known as byssinosis, is an occupational lung disorder caused by prolonged inhalation of cotton dust in textile and cotton processing industries. The inhaled dust irritates the airways, leading to symptoms such as chest tightness, cough, wheezing, and shortness of breath. Long-term exposure can result in chronic bronchitis and reduced lung capacity. Preventive Measures: Proper ventilation and dust control in textile mills Use of protective masks by workers Regular health check-ups and dust monitoring

Question 3809

The addition of gypsum to Portland cement helps in:

Aincreasing the strength of cement

Brapid setting of cement

Cpreventing rapid setting of cement

Dreducing in the cost of cement

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C. preventing rapid setting of cementExplanation not yet available.

Question 3808

Which of the following could be used as fuel in propellant of rockets?

Aliquid hydrogen + liquid nitrogen

Bliquid oxygen + liquid argon

Cliquid nitrogen + liquid oxygen

DLiquid hydrogen + liquid oxygen

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D. Liquid hydrogen + liquid oxygenExplanation not yet available.

Question 3807

'Shock –absorbers' are usually made of steel as it:

Ais not brittle

Bhas lower elasticity

Chas higher elasticity

Dhas no ductile property

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C. has higher elasticityExplanation not yet available.

Question 3806

The function of ball bearing in a wheel is:

Ato increase friction

Bto convert kinetic friction into rolling friction

Cto convert static friction into kinetic friction

Djust for convenience

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B. to convert kinetic friction into rolling frictionExplanation not yet available.

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Science

In coriander the useful parts are:

Which of the following minerals is found in Monazite sand ?

Who invented vaccination for 'small pox'?

The optimum dissolved oxygen level (in mg/litre) required for survival of aquatic organism is:

Iodoform is used as an:

White lung disease is prevalent among the workers of:

The addition of gypsum to Portland cement helps in:

Which of the following could be used as fuel in propellant of rockets?

'Shock –absorbers' are usually made of steel as it:

The function of ball bearing in a wheel is:

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