Acidic,Basic Natures of Oxides

Q.

Water soluble bases are called:

1. Metallic salts

2. Alkalis

3. Salts

4. Acidic oxides

Q.

M is an element in the form of a powder. M burns in oxygen and the product obtained is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences.

(a) If M is a metal, then the litmus will turn ...........

(b) If M is a non-metal, then the litmus will turn .........

(c) If M is a reactive metal, then ........... will be evolved when M reacts with dilute sulphuric acid.

(d) If M is a metal, it will form ........ oxide, which will form ....... solution with water.

(e) If M is a non-metal, it will not conduct electricity in the form of.........

Q. which of the following oxide is lest basic and why 1.CrO 2.Cr2O3 3.CrO3 4.Cr2O

Q. State the character of the hydroxide of the element in period-3 group-13[IIIA]

Q.

Element P, Q, R and S belong to the same group. The oxide of P is acidic, oxide of Q and R are amphoteric while the oxide of S is basic. Which of the following elements is the most electropositive ?

1. S

2. P

3. Q

4. R

Q.

The order in which the following oxides are arranged according to decreasing basic nature is

1. 

2. 

3. 

4. 

Q.

The element which can form an acidic oxide should be the one whose atomic number is :

(a) 6 (b) 16 (c) 12 (d) 19

Q.

Metallic nature and basic nature of the oxides _____ as we move along a period

1. Remains constant

2. Increases

3. Decreases

4. First increases then decrease

Q.

The correct order for the increasing order of oxidizing power is

1. 

2. 

3. 

4. 

Q. X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences:
(a) If X is a metal, then the litmus will turn ___________.
(b) If X is a non-metal, then the litmus will turn _________.
(c) If X is a reactive metal, then _________ will be evolved, when X reacts with dilute sulphuric acid.
(d) If X is a non-metal, it will form _________ oxide, which will form _________ solution with water.
(e) If X is a non-metal, it will not conduct electricity unless it is carbon in the form of _________.

Q.

the order of metallic character of elements A, B, C and D is D>A>C>B

1. What is the order of their electronegative character?

2. What is the nature of oxide of B if oxide of A is amphoteric?

Q.

Name a base which is not alkali.

Q.

Arrange the following hydrides in their increasing acid strength $[C{H}_4,H_{2}S,P{H}_{3}andSi{H}_4]$ -

1. 
2. 
3. 
4. 

Q.

Question 11

What type of oxides are formed when non-metals combine with oxygen?

Q. \vert.Which of the following elements forms an acidic oxide?(a) Mg(b) Na(c) P(d) K

Q.

which elements of group 14 forms the most acidic oxide?

Q. Arrange the following hydrides in their increasing acid strength $[C{H}_4,H_{2}S,P{H}_{3}andSi{H}_4]$ -

1. 
2. 
3. 
4. 

Q.

explain the reason why basic nature of oxides decreases along a period and increases down the group ?

Q.

Identify the least stable ion among the following.

1. 

2. 

3. 

4. 

Q.

Which of the following is wrong?

1. NH3 < PH3 < AsH3 < Acidic character

2. Li+ < Na+ < K+ < Cs+ < Ionic radius

3. Al2O3 < MgO < Na2O < K2O < Basic character

4. Li < Be < B < C < IE1

Q.

Which of the following oxides is not expected to react with sodium hydroxide? [CBSE AIPMT 2009]

1. $B_2{O}_3$

2. $CaO$

3. $Si{O}_2$

4. $BaO$

Q.

Most reducing agent is

1. K

2. Mg

3. Al

4. Ba

Q.

The pair of amphoteric hydroxides is

1. 

2. 

3. 

4. 

Q.

Strongest reducing agent is

1. Cl₂

2. Cl^-

3. I^-

4. Br^-

Q.

Which statement is correct ?

1. Sn4+ is more stable than Sn2+

2. Pb2+ is more stable than Pb4+

3. Both (A) and (B)

4. None of these

Q.

Which of the following oxides is amphoteric in character

1. CO₂

2. CaO

3. SiO₂

4. SnO₂

Q.

Which one of the following oxides is neutral

1. ZnO

2. CO

3. SnO₂

4. SiO₂

Q. X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. If X is a non metal, then the litmus will turn:

1. Red to blue
2. Blue to red
3. Both $B$ and $C$
4. No change on red litmus