Nature of Matter

Q.

Write a short note on the following: Solution

Q.

Explain why water is a compound and not a mixture give any five points

Q.

What is Binary Solution?

Q.

Why the expansion of octet occurs in some elements?

Q.

difference between g-atom, g-mole and g-molecule?

Q.

2.38g uranium was heated strongly in a current of air. the resulting oxide weighted 2.806 g. determine the empirical formula of the oxide?

A) U4O8

B) U3O8

C) U9O5

D) U1O9

Q. Statements about heavy water are given below.
A. Heavy water is used in exchange reactions for the study of reaction mechanisms.
B. Heavy water is prepared by exhaustive electrolysis of water.
C. Heavy water has higher boiling point than ordinary water.
D. Viscosity of $H_{2}O$ is greater than $D_{2}O$.

Choose the more appropriate answer from the options given below:

1. A, B and C only
2. A and B only
3. A and D only
4. A and C only

Q.

How many elements are there in $6th$ Period?

Q. { Two components in the ratio }x: y form an azeotropic }}{ mixture. They are mixed in the ratio of }x:2y, how many }} moles one of the pure component y will be evaporated } before getting azeotropic solution?

Q. which of the following is most likely formula of platinum complex, if 1/4 of total chlorine of the compound is precipitated by adding AgNO3 to its aqueous solution- (1) PtCl4.6H20 (2) PtCl4.5H2O (3) PtCl2.2H2O (4) PtCl4.3H2O

Q.

Give one example of the following:

a solution of gas in liquid

Q.

The latin name for Mercury is ______________.

Q.

Can elements be broken down?

Q.

Where metalloids are placed in the periodic table?

Q.

Is milk a mixture or a compound?

Q.

According to Indian philosophers, all materials are made up of how many elements?

Q.

Write down the symbol, atomic number, and atomic mass of hydrogen.

Q.

Ionization potential increases across a period from left to right because the

1. (a) atomic radius increases and nuclear charge increases

2. (b) atomic radius decreases and nuclear charge decreases

3. (c) atomic radius increases and nuclear charge decreases

4. (d) atomic radius decreases and nuclear charge increases

Q.

The Latin name of copper is ______ and its symbol is ______.

1. Cuprum, Cu

2. Kalium, Ka

3. Kuprum, Ku

4. Colium, Ca

Q.

What are Empty elements and is it valid?

Q.

Milk is a compound

1. True
2. False

Q. The longest and shortest periods are

1. 1&6
2. 2&6
3. 1&7
4. 6&1

Q.

What is the Latin name of Sodium?

Q.

Name the branch which deals with the behavior of matter.

Q.

Which of the chapter we have to start from physica, l organic and inorganic chemistry from byju's class 11 course?

Q. Which of the following is not a metalloid?

1. $B$
2. $Sb$
3. $Sn$
4. $Ge$

Q.

What volume of CH₄ at NTP contains same number of molecules as atoms in 16g of S₈ ?

Q.

An atom with nuclear charge of +13 and containing 14 neutrons has atomic number = ________ and mass number = __________.

Q. Xanthoproteic test is given by:

1. Phenylalanine
2. Tyrosine
3. Glycine
4. Tryptophan

Q.

Elements cannot be broken down into simpler substances either physically or chemically.

1. True
2. False