Class 7 Science ch 2 MCQ. We covered all the Class 7 Science ch 2 MCQ in this post for free so that you can practice well for the exam.
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MCQ on General Science for Class 7 Students
Food cans are coated with tin but not with zinc because
(a) zinc is costlier than tin
(b) zinc has a higher melting point than tin
(c) zinc is more reactive than tin
(d) tin is more reactive than zinc
Option c – zinc is more reactive than tin
The date of manufacture of food items fried in oil should be checked before buying because oils become rancid due to
(a) oxidation
(b) reduction
(c) hydrogenation
(d) decrease in viscosity
Option a – oxidation
Which one of the following is responsible for converting milk into curd?
(a) Fungi
(b) Bacteria
(c) Virus
(d) None of these
Option b – Bacteria
Which one of the following is responsible for the stimulating effect of tea?
(a) Tannin
(b) Steroid
(c) Alkaloid
(d) Flavonoid
Option c – Alkaloid
Which among the following oils has the maximum protein content?
(a) Castor oil
(b) Sunflower oil
(c) Soyabean oil
(d) Safflower oil
Option a – Castor oil
Which one of the following is commonly used as a flavoring agent during the preparation of noodles?
(a) Saffron
(b) Cinnamon
(c) Olive oil
(d) Ajinomoto
Option d – Ajinomoto
Vinegar is also known as
(a) ethanoic acid
(b) nitric acid
(c) sulphuric acid
(d) tartaric acid
Option a – ethanoic acid
The sweetest sugar among the following is
(a) fructose
(b) glucose
(c) maltose
(d) sucrose
(e) None of the above/More than one of the above
Option a – fructose
Milk is a poor source of
(a) calcium
(b) protein
(c) vitamin C
(d) carbohydrate
(e) None of the above/More than one of the above
Option c – vitamin C
Mother’s milk provides an almost complete diet to the newborn, but it lacks the following :
(a) Iron
(b) Calcium
(c) Magnesium
(d) Potassium
Option d – Potassium
Which of the following substances is obtained from a tree?
(a) Asafoetida
(b) Bitumen
(c) Tincal
(d) None of the above
Option a – Asafoetida
Among the given nutrients, milk is a poor source of
(a) Calcium
(b) Protein
(c) Carbohydrates
(d) Vitamin C
Option d – Vitamin C
What is the purpose of adding baking soda to the dough?
(a) To generate moisture
(b) To give a good flavor
(c) To give good color
(d) To generate carbon dioxide
Option d – To generate carbon dioxide
The term ‘operation flood’ refers to
(a) Flood control
(b) Milk production
(c) Population control
(d) Foodgrain production
Option b – Milk production
What is mixed farming?
(a) Growing several crops in a planned way
(b) Growing rabi as well as Kharif crops
(c) Growing several crops and also rearing animals
(d) Growing fruits as well as vegetables
Option c – Growing several crops and also rearing animals
Which one of the following is categorized as millet?
(a) Wheat
(b) Rice
(c) Sorghum
(d) Maize
Option c – Sorghum
In an area with an annual rainfall of more than 200 cm and sloping hills which crop will be ideal?
(a) Jute
(b) Cotton
(c) Maize
(d) Tea
Option d – Tea
Monoculture is a distinct characteristic of
(a) Commercial grain farming
(b) Shifting cultivation
(c) Subsistence farming
(d) Organic farming
Option a – Commercial grain farming
Which of the following crops are grown mostly under subsistence farming?
(a) Millet and Rice
(b) Cotton and Tobacco
(c) Tea and Coffee
(d) Vegetables and Fruits
Option a – Millet and Rice
The Dapog method of rice nursery was developed in
(a) China
(b) Indonesia
(c) Japan
(d) the Philippines
Option d – the Philippines
Which one of the following is an example of subsistence farming?
(a) Shifting cultivation
(b) Commercial farming
(c) Extensive and intensive farming
(d) Organic farming
Option a – Shifting cultivation
Which one of the following soils is suitable for cotton production?
(a) Regur
(b) Red
(c) Bhangar
(d) Khadar
Option a – Regur
In India, more than half of the production of soybean comes from
(a) Andhra Pradesh
(b) Madhya Pradesh
(c) Maharashtra
(d) Rajasthan
Option b – Madhya Pradesh
The white color of milk is due to the presence of
(a) lactose
(b) albumins
(c) carotenes
(d) caseins
Option d – caseins
Refrigeration helps in food preservation by
(a) killing the germs
(b) reducing the rate of biochemical reactions
(c) destroying enzyme action
(d) sealing the food with a layer of ice
Option b – reducing the rate of biochemical reactions
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