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Science and Tech Mock Test
1 / 10
Which one of the following is pure water?
Rainwater is considered the purest form of water available on the Earth. However, the rainwater we receive on earth is not necessarily pure, as it brings down impurities and particles present in the atmosphere along with it. Distilled Water is also pure from any contaminants, but it has no minerals in it as well.
2 / 10
The function of ball bearings in a wheel is:
The function of ball bearings in a wheel is to convert kinetic friction into rolling friction because rolling friction is much lesser than sliding friction. Ball bearings reduce friction and facilitate easy movement.
3 / 10
A rocket works on the principle of conservation of:
A rocket works on the principle of conservation of linear momentum. Rocket ejaculates gases in backward direction which creates momentum of the gases backward and thus by conservation of momentum, the rocket gets momentum in the forward direction making it move forward.
4 / 10
Which of the following vegetable oils does not contain essential fatty acids?
Omega-3 and 6 fatty acids are also called essential fatty acids. Coconut oil does not contain essential fatty acids. It is a highly beneficial healthy fat but does not actually contain Omega fatty acids. Sunflower oil, Mustard oil and Groundnut oil contain essential fatty acids.
5 / 10
Soap is prepared by boiling caustic soda with:
Soap is prepared by boiling caustic soda with Fats. Soap is prepared by hydrolyzing fat under alkaline (basic) conditions. The reaction is called saponification, and produces one molecule of glycerin and three molecules of soap, for each molecule of fat taken.
6 / 10
The addition of gypsum to portland cement helps in:
Gypsum is a mineral and is hydrated calcium sulphate in chemical form. It slows down the hydration process of cement once it is mixed with water. It is mainly used for preventing the rapid setting of cement.
7 / 10
The term 'GM food' refers to the food:
Genetically modified (GM) foods are foods derived from organisms whose genetic material (DNA) has been modified in a way that does not occur naturally. GM is a technology that involves inserting DNA into the genome of an organism. To produce a GM plant, new DNA is transferred into plant cells.
8 / 10
The energy stored in a watch spring is:
Potential energy is the stored energy in any object or system by virtue of its position or arrangement of parts. The energy stored in a watch spring is potential energy. When a spring is compressed, it stores energy in form of elastic potential energy.
9 / 10
Clove, the commonly-used spice, is obtained from the:
Cloves are commonly used as a spice. They are the dried flowers of the tree Syzygium aromaticum.
10 / 10
Bird Flu virus cannot be transmitted through food cooked beyond:
According to WHO, the Bird Flu virus cannot be transmitted through food cooked beyond 70 degrees Celsius.
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