Questions

Q:

The mass number of an isotope of an element is 298. If its nucleus has 189 neutrons, what is its atomic number?

A) 298 B) 189
C) 109 D) 487
 
Answer & Explanation Answer: C) 109

Explanation:
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Q:

The mass of a mole of NaCl is the

A) 58.44 gm/mol B) 57.25 gm/mol
C) 56.31 gm/mol D) 59.14 gm/mol
 
Answer & Explanation Answer: A) 58.44 gm/mol

Explanation:

To get the mass of a mole of NaCl, we need to add the molar atomic weights of the individual elements i.e, Na and Cl

Atomic weights of Na = 22.99 gm/mol  Cl = 35.45 gm/mol

 

Now, mass of a mole of NaCl = 22.99 + 35.45 = 58.44 gm/mol.

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Q:

Which of the following is a healthy blood pressure level?

A) 120/80 B) 140/90
C) 135/75 D) 130/70
 
Answer & Explanation Answer: A) 120/80

Explanation:

A normal reading would be any blood pressure below 120/80 mm Hg and above 90/60 mm Hg in an adult. If you're in the normal range, no medical intervention is needed.

However, you should maintain a healthy lifestyle and healthy weight to help prevent hypertension from developing.

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Q:

When setting up a Google AdWords Account, why should you choose your currency and time zone carefully?

Answer

These can not be edited once the account is set up.

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Q:

What is the effect of including both keywords and placements in an Ad Group on the Display Network?

Answer

Your ads will be restricted to only specific sites that you choose and webpages where the content is relevant to the theme of the keywords.

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Q:

Which are the regional Commissions of the UN Economic and Social Council

A) Economic Commission for Europe, Economic Commission for Asia and Pacific B) Economic Commission for Africa
C) Economic Commission for Latin America and the Caribbean D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:
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Q:

4 components all computers have in common

Answer

The 4 components all computers have in common are Input, Output, Storage and Processing. 

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Q:

Which stage of cellular respiration produces the most ATP?

A) Glycolysis B) Kreb's cycle
C) Electron transport chain D) All the above
 
Answer & Explanation Answer: C) Electron transport chain

Explanation:

There are 3 stages in cellular respiration. They are:

1. Glycolysis

2. Kreb's cycle

3. Electron transport chain

 

Here, Glycolysis produces only 2 ATP whereas Kreb's cycle produces no ATP. Electron transport chain of the cellular respiration produces the maximum ATP.

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