Test Details

Atoms And Molecules

Nov 10, 5:00 PM

45 minutes

Nov 10, 5:45 PM

40.0 marks

MCQ

40 questions

Nishu Yadav

I have 10 Years Of Teaching Experience In Few Prestigious school's like Delhi Public School and Meerut Public School. In the course of my career, I have been proud my students were able to secure good academic results in Maths & Science.

Class Details

science and maths

class 9

science and maths

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Question Text

Question 1 :
The number of charges on an ion formed by a non-metal is :

Question 4 :
2 moles of chlorine atoms are present in_____g of chlorine gas.

Question 5 :
The valency of an element A is 4 and that of another element B is 2. The formula of the compound formed from A and B is $A_2B.$

Question 9 :
Which quantity is needed to relate moles with the number of atoms?

Question 11 :
A salt of binary acid $H_2S$ is $MS$. Then the valency of metal $M$ is 2.

Question 12 :
The chemical formula of the compound containing carbon and oxygen is :

Question 13 :
The sum of mass of all the atoms in a molecule is known as :

Question 14 :
What is the molecular weight of$\displaystyle HCl{ O }_{ 4 }$?

Question 20 :
The relative formula mass, $M_{r}$, of calcium carbonate, $CaCO_{3}$, is $100$. What is the mass of carbon present in $100\ g$ of calcium carbonate?

Question 22 :
How many atoms do make a piece of aluminium foil which has mass of 27 grams?

Question 24 :
Compound A on strong heating in a boiling tubegives off reddish brown fumes and a yellow residue with a few drops of sodium hydroxide solution, a white precipitate appeared. Identify the cation and anion present in the compound A.

Question 26 :
Atoms will gain or lose electrons depending on which action takes the :

Question 28 :
The number of moles of $H_{2}$ in $0.224$ L of hydrogen at STP is:

Question 29 :
How manycompounds are formed by electrovalency?$KCl, NaCl, CsCl, O_2, N_2, CO_2, BaO, CaCl_2, H_2O$

Question 30 :
Which of the following is a wrong representation of atom and it's ion?

Question 31 :
The simplest compounds which are made up of two constituents are known as :

Question 32 :
How many atoms are represented in$\displaystyle { Na }_{ 2 }{ CO }_{ 3 }\cdot 10{ H }_{ 2 }O$

Question 35 :
Which of the following sample contains the maximum number of atoms?

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