RRB NTPC Paper 1 will comprise of 40 GK questions from various sections such as History, Polity, Geography, Chemistry, Biology, Physics etc. In the Chemistry section particularly, at least 3-4 questions are put up from topics including SI units, Chemical Name of Important substances like Plaster of Paris, etc.
Here is the list of important topics for the Chemistry section in RRB NTPC Exam:
Topics |
SI Units |
Properties of Gases |
Alloys |
Surface Chemistry |
Chemical Properties of Substance and their uses |
Atoms, Molecules, Elements, Compounds |
Chemistry in Daily Life |
Usage and Composition of Chemicals |
Chemical Name of Important Substances |
To help you score better marks in RRB NTPC Chemistry section, we have provided 60+ chemistry questions in PDF format in both English and Hindi language. These questions are the top questions asked in the Chemistry section, you can download the PDFs, the links for which are given below in the article.
Note: We have already uploaded Static GK, Geography, Biology & History questions from previous years' papers in the form of PDF. The direct link is given at the end of this article.
Students can download Chemistry PDFs in English & Hindi languages from the direct link given below:
Topic | Download PDF (Hindi/ English) |
60+ Chemistry Questions PDF | Click Here (English) |
60+ रसायन विज्ञान के प्रश्न | Click Here (Hindi) |
Read suggested: Coding Decoding Questions for RRB NTPC
Here is a sample of 60+ Chemistry Questions PDF
Q 1. What of the following is a good source of Vitamin A?
Solution: Vitamin A is found in Carrot, meat, fish, and dairy products.
Provitamin A is found in plant-based foods such as fruits and vegetables. The most common type of pro-vitamin A is beta-carotene.
Vitamin A helps form and maintains healthy teeth, skeletal and soft tissue, mucus membranes, and skin. It is also known as retinol because it produces the pigments in the retina of the eye.
Vitamin A is found in two forms:
* Retinol: Retinol is an active form of vitamin A
* Carotenoids: Carotenoids are dark coloured dyes (pigments)
Q 2. Richness of mixed compound elements of nitrogen and phosphorus is known as:
Solution:
- Eutrophication is excessive richness of nutrients in a lake or other body of water, frequently due to run-off from the land
- It happens generally due to excessive growth of Algae. And it may lead to oxygen depletion of the water body. For example – Algae Bloom
- More specifically it is caused by discharge of Nitrate or Phosphate containing detergents, fertilizers or waste material in aquatic system like lakes
- Although eutrophication is commonly caused by human activities, it can also be a natural process, particularly in lakes. Eutrophy occurs in many lakes in temperate grasslands
Q 3. When two liquid material do not mix with each other and do not make solution, then they are called
Solution:
* When two liquids do not mix with each other and do not make solution, then they are called Immiscible.
* Immiscibility is the property where two substances do not mix to form a homogeneous mixture. The fluid which mix in each other are called as Miscible fluids.
* In immiscible solutions the higher density liquid settles down and the lower density solution rises up as the case in mixing petrol and water.
Q 4. Milk of Magnesia is used as-
Solution:
* Milk of magnesia is used as a Laxative, which works by drawing water into the intestines, it treats constipation. This is because it can reduce the amount of stomach acid while increasing water in the intestines.
* The chemical name of Milk of Magnesia is Magnesium Hydroxide.
* Milk of magnesia usually relieves constipation within 6 hours of taking it
Q 5. Who is known as the “Father of modern chemistry’?
Solution:
* Antoine Lavoisier is considered the father of modern chemistry.
* He is both a historical personality as well as a chemist of 18th century France. Lavoisier is most noted for his discovery of the role oxygen plays in combustion.
* He also recognises and named oxygen and hydrogen and was first to establish that sulfur was an element rather than a compound.
* He also gave the principle of conservation of mass in chemical reactions.
Q 6. What is the reason for the different mass of an isotope of an atom of an element?
Solution:
* Isotopes are different variants of a principle element that differs in Number of Neutrons and Same number of Protons.
*It was coined by a Scottish doctor and writer Margaret Todd in 1913 in a suggestion to chemist Frederick Soddy.
*For example, carbon-12, carbon-13, and carbon-14 are isotopes of carbon, which means that every atom has 6 protons but the neutron numbers of these isotopes are 6, 7, and 8, respectively.
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