Tag: chemistry

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Questions Related to chemistry

Multiple choice chemistry nature of things objects around us different types of materials materials around us and importance of grouping

Which of the following object can be made by same materials_____.

  1. bottles, utensils, toys

  2. chair, table, house

  3. ornaments, umbrella, tents

  4. well, tube well, handpump
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A plastic is any material that can be shaped or molten into any form,

so you can find it in bottle, utensils,toy ,etc
Hence, 
option $A$ is correct answer.

Multiple choice chemistry nature of things objects around us different types of materials materials around us and importance of grouping

Who was the scientist to make attempts for giving explanatory definition of element?

  1. Rontgen

  2. Dalton

  3. Rutherford

  4. Laveziour
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rontgen discovered X-rays.
Dalton proposed the postulates of Atomic Theory.
Rutherford discovered $\alpha$ and $\beta$ and also [performed the Gold-foil experiment for the discovery of the nucleus.
Laveziour attempted to give the explanatory definition of elements and stated that element is the basic unit of substance.

Multiple choice chemistry nature of things objects around us different types of materials materials around us and importance of grouping

Identify which group of objects are made from the same material.

  1. Comb, hairclip, water bottle and shoes

  2. Shoes, brief-case, belts and flower pot

  3. Car, bike, bicycle and ship

  4. Shirts, night suits, bed-sheets and mirrors
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The option $C$ contain the objects made up of by same material that is plastic .

Multiple choice chemistry nature of things objects around us different types of materials materials around us and importance of grouping

Which of the following object(s) are made from plastic?

  1. Bucket

  2. Table

  3. Plate (thali)

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plastic is a very useful polymer. It is used on a large scale for production of various articles. Buckets, tables, plates, chairs, bottles are few examples of articles made of plastic. Hence answer is option D.

Multiple choice chemistry nature of things objects around us different types of materials materials around us and importance of grouping

Which of the following object(s) are made from steel?

  1. Cupboard

  2. Table

  3. Chair

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Steel is an important alloy of ions that is used on a very large scale in modern industry due to its high durability and strength. It is also used to manufacture tables, chairs, cupboards, fans, utensils,etc. Thus answer is option D.

Multiple choice chemistry nature of things objects around us different types of materials materials around us and importance of grouping

Which of the following is called as dry ice

  1. Solid $CO _2$
  2. Solid $NO _2$
  3. Solid $SO _2$
  4. $CO _2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Solid carbon dioxide is called dry ice. Because it looks like ice and because when it melts (it actually sublimes) it goes from solid straight to gas, no liquid, hence dry ice.
Hence option A is correct.

Multiple choice chemistry nature of things objects around us different types of materials materials around us and importance of grouping

Electric wires, coils, and machines are made of metals. Which of the following metal cannot be used for them?

  1. copper

  2. silver

  3. iron

  4. sodium
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Electric wires, coils and machines are made of hard metals. Sodium is a very soft metal which can be cut through knife hence it cannot use to prepare electric wires, coils and machines.

Multiple choice chemistry aldehydes, ketones and carboxylic acids alkanoic acids nomenclature of carboxyl group nomenclature of carboxylic acids

Sodium salt of an organic acid 'X' produces effervescence with conc. $H _2SO _{4}$. 'X' reacts with the acidified aqueous $CaCl _2$ solution to give a white precipitate which decolourises acidic solution of $KMnO _4$. 'X' is 

  1. $C _6H _5COONa$
  2. $HCOONa$
  3. $CH _3COONa$
  4. $Na _2C _2O _4$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sodium oxalate (Na2C2O4) reacts with H2SO4 to release CO/CO2, and with CaCl2 to form calcium oxalate (white precipitate). Calcium oxalate is then oxidized by KMnO4 in acidic medium.