Q:

Which one of the following orders presents the correct sequence of the increasing basic nature of the given oxides?

(1) $K_{2} O < N a_{2} O < A l_{2} O_{3} < M g O$

(2) $A l_{2} O_{3} < M g O < N a_{2} O < K_{2} O$

(3) $M g O < K_{2} O < A l_{2} O_{3} < N a_{2} O$

(4) $N a_{2} O < K_{2} O < M g O < A l_{2} O_{3}$

A) Option 1	B) Option 2
C) Option 3	D) Option 4

Answer & Explanation Answer: B) Option 2

Explanation:

While moving from left to right in periodic table basic character of oxide of elements will decrease.

$∴ \to_{I n c r e a \sin g b a s i c s t r e n g t h}^{A l_{2} O_{3} < M g O < N a_{2} O}$

and while descending in the group basic character of corresponding oxides increases.

$∴ \to_{I n c r e a \sin g b a s i c s t r e n g t h}^{N a_{2} O < K_{2} O}$

$∴ C o r r e c t O r d e r i s A l_{2} O_{3} < M g O < N a_{2} O < K_{2} O$

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Filed Under: Chemistry
Exam Prep: AIEEE

14 4517

Q:

A data dictionary is a special file that contains

A) The width of all fields in all files	B) The data type of all fields in all file
C) The name of all fields in all files	D) All of the above

Answer & Explanation Answer: D) All of the above

Explanation:

A data dictionary is a special file that contains a set of information describing the contents, format, and structure of a database and the relationship between its elements, used to control access to and manipulation of the database.

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Filed Under: Database
Exam Prep: Bank Exams
Job Role: Analyst , Bank Clerk , Database Administration , IT Trainer

7 4516

Q:

When is International Mother's Day is observed?

A) December 11	B) November 29
C) 2nd Sunday of May	D) Second Wednesday of October

Answer & Explanation Answer: C) 2nd Sunday of May

Explanation:

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Filed Under: Important Days and Years

4 4515

Q:

What are the particles emitted by radio active element after 3 consequtive disintegrations?

A) 2 alpha 1 beta	B) 1 alpha 1 beta
C) 2 beta 1 alpha	D) 2 beta 2 alpha

Answer & Explanation Answer: C) 2 beta 1 alpha

Explanation:

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Filed Under: Physics

5 4515

Q:

The first thermionic valve was invented by

A) Thomas Edison	B) Richardson
C) J.A. Fleming	D) Lee De Forest

Answer & Explanation Answer: C) J.A. Fleming

Explanation:

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Filed Under: Inventions

1 4514

Q:

Which of the statements given below are correct?

A) In 2017, Gary Cahill captained the Premier League team Arsenal.

B) In 2018 IPL auctions, Kolkata Knight Riders retained Sunil Narine.

C) Roger Federer won the Tennis 2017 Wimbledon Championships Men's Singles.

A) Only B	B) B and C
C) A, B and C	D) None of these

Answer & Explanation Answer: B) B and C

Explanation:

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Filed Under: Sports
Exam Prep: Bank Exams

0 4513

Q:

What can you hold but not touch?

Answer

There are many possibilities for this.

We can hold a breathe, meeting, conversation, party, grudge, etc... but cannot touch them.

Workspace

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Subject: Word Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GRE , TOEFL
Job Role: Analyst , Bank Clerk , Bank PO

8 4513

Q:

During which decade did the population of India record a negative growth rate?

A) 1921 - 31	B) 1911 - 21
C) 1941 - 51	D) 1931 - 41

Answer & Explanation Answer: B) 1911 - 21

Explanation:

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Filed Under: General Awareness

2 4513

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