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 4518

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 4518

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 4517

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 4516

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 4514

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

Q:

Which is the largest desert in Asia?

A) Kyzyl kum	B) Thar
C) Karakum	D) Gobi

Answer & Explanation Answer: D) Gobi

Explanation:

The largest desert in Asia is called the Gobi Desert. It covers an area of 500,000 square miles stretching from southern Mongolia to northern China.

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Filed Under: Indian Geography
Exam Prep: CAT , Bank Exams , AIEEE
Job Role: Bank PO , Bank Clerk , Analyst

6 4513

Q:

Which of the following is usually not considered a goal of portfolio management?

A) To manage the effective and efficient use of resources.	B) To balance the portfolio among incremental and radical investments.
C) To maximize the value of the portfolio by careful examination of candidate projects and exclusion of those no meeting strategic objectives.	D) To ensure that the relationship between projects in the portfolio clearly reflects strategic objectives.

Answer & Explanation Answer: D) To ensure that the relationship between projects in the portfolio clearly reflects strategic objectives.

Explanation:

There is not necessarily a relationship between projects in a portfolio. Answer D is actually one of the goals of PROGRAM management. PMBOK Guide [1.4]

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Filed Under: PMP Certification

0 4511

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