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 5102

Q:

Which one of the following strongly threatens biodiversity?

A) Eragile ecosystems such as mangroves and wetlands	B) Inaccessible habitates in the Himalayas
C) Desstruction of natural habitates and regetation and Jhum cultivation	D) Creation of biosphere reserves

Answer & Explanation Answer: C) Desstruction of natural habitates and regetation and Jhum cultivation

Explanation:

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Filed Under: Biology

13 5101

Q:

To remove duplicate rows from the results of an SQL SELECT statement, the ________ qualifier specified must be included.

A) ONLY	B) DISTINCT
C) UNIQUE	D) SINGLE

Answer & Explanation Answer: B) DISTINCT

Explanation:

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Filed Under: Database

1 5101

Q:

The most abundant metal in earth crust is

A) Iron	B) magnesium
C) calcium	D) aluminium

Answer & Explanation Answer: D) aluminium

Explanation:

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Filed Under: Chemistry

6 5100

Q:

Which is the only snake that builds nests?

A) Viper	B) King Cobra
C) Anaconda	D) Python

Answer & Explanation Answer: B) King Cobra

Explanation:

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Filed Under: Animals and Birds

19 5100

Q:

Who has been selected for the 2016 National Geoscience Award in the field of geo-environmental studies?

A) Keshav Krishna	B) Ashok Kumar Singhvi
C) P.V. Joseph	D) Vishnu Deo Sai

Answer & Explanation Answer: A) Keshav Krishna

Explanation:

Dr. A Keshav Krishna, a scientist at the National Geophysical Research Institute (NGRI), has been selected for 2016 National Geoscience Award by the Ministry of Mines in the field of Geo-environmental studies in applied geosciences.

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Filed Under: Honours and Awards

7 5098

Q:

The World Day to Combat Desertification is observed every year on _______

A) 4th May	B) 17th June
C) 14th August	D) 3rd October

Answer & Explanation Answer: B) 17th June

Explanation:

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Filed Under: Important Days and Years

58 5095

Q:

Online functional learning portals are accessed through the

A) Web portal	B) Interactive Multimedia Instruction
C) Instructor Facilitated New Equipment	D) All the above

Answer & Explanation Answer: A) Web portal

Explanation:

Online functional learning portals are accessed through the web portal.

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Filed Under: Computer
Exam Prep: AIEEE , Bank Exams
Job Role: Analyst , Bank Clerk , Bank PO

8 5089

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