Chemistry Test-9

Result

Chemistry Test-9

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

Which of the following may be used as an antipyretic, anti-inflammatory as well as an analgesic?

A
Aspirin

B
Alkaloid codeine

C
Morphine

D
Chloroform
Solution
Aspirinmay be used as an antipyretic, anti-inflammatory as well as an analgesic.
Aspirin or acetylsalicylic acid is a salicylate drug often used as an analgesic to relieve minor aches and pains also as an antipyretic to reduce fever and as an anti-inflammatory medication. Salicylic acid, the main metabolite of aspirin, is an integral part of human and animal metabolism.
Aspirin can relieve mild to moderate pain, swelling, or both associated with many health issues, such as:
- Headaches
- A cold or flu
- Sprains and strains
- Menstrual cramps
- Long-term conditions, such as arthritis and migraine
Question 2
4 / -1

Which of the following hydrocarbons show conformational isomerism?

A
\(\ce{CH2=CH2}\)

B
\(\ce{CH3-CH3}\)

C
\(\ce{CH2=CHOH}\)

D
None of the above

Solution

Alkanes show conformational isomerism, because ethane is an alkane.
Question 3
4 / -1

In which group of the modern periodic table the halogens are placed?

A
\(1 6^{\text {th }}\)

B
\(1 8^{\text {th }}\)

C
\(1 ^{\text {th }}\)

D
\(1 7^{\text {th }}\)

Solution

The halogens are placed in \(1 7^{\text {th }}\) group of the modern periodic table.

The halogens are a group in the periodic table consisting of five or six chemically related elements: fluorine, chlorine, bromine, iodine , and astatine. The artificially created element \(117\), tennessine is also a halogen. In the modern IUPAC nomenclature, this group is known as group \(17\). They all belong to group \(17\) and have \(7\) electrons in the outermost shell.
Question 4
4 / -1

What happens when dilute hydrochloric acid is added to iron filings?

A
Hydrogen gas and iron chloride are produced

B
Chlorine gas and iron hydroxide are produced

C
No reaction takes place

D
Iron salt and water are produced

Solution

When dilute hydrochloric acid is added to iron filings, hydrogen gas and iron chloride are produced.
We know that, addition of acid with metal gives salt and hydrogen gas. When dilute Hydrochloric acid is added to iron filings, iron chloride and hydrogen gas is produced. In this reaction iron displaces hydrogen from hydrochloric acid to form iron chloride & hydrogen gas this reaction is a single displacement reaction. The chemical reaction is given below:
\(\mathrm{Fe}_{(\mathrm{s})}+2 \mathrm{HCl} \longrightarrow \mathrm{FeCl}_2(\mathrm{aq})+\mathrm{H}_2(\mathrm{~g}) \uparrow\)
Question 5
4 / -1

Which of the following is not a biopolymer?

A
Starch

B
Rubber

C
Proteins

D
Nucleic acids

Solution

Rubber is a natural polymer but not a natural biopolymer. While starch protein and nucleic acid are the Biopolymer.
Question 6
4 / -1

What does Green Chemistry in terms of environment mean?

A
Greenhouse effect

B
Reaction related to depletion of ozone layer

C
Photosynthetic reactions in plants

D
Reduction in the use and production of hazardous chemicals

Solution

Green chemistry is also known as environmentally sustainable chemistry.
Perhaps, the most widely accepted definition of green chemistry is the one offered by chemists Paul Anastas and John Warner, who defined green chemistry as the design of chemical products and processes that reduce or eliminate the use and generation of hazardous substances.
Question 7
4 / -1

Which statement is false in respect to taking drugs until 1970s?

A
Over production of acid in the stomach causes irritation and pain.

B
With metal hydroxides salts, the patients can betreated easily.

C
Excessive hydrogen carbonatecan make the stomachalkaline and trigger the production of even more acid.

D
With metal salts, the patients cannot betreated easily as insevere cases, ulcers are developed in the stomach because of them.

Solution

The statement is false in respect to taking drugs until 1970s is "With metal hydroxides salts, the patients can betreated easily".
Over production of acid in the stomach causes irritation and pain. Insevere cases, ulcers are developed in the stomach. Until 1970, onlytreatment for acidity was administration of antacids, such as sodiumhydrogencarbonate or a mixture of aluminium and magnesiumhydroxide. However, excessive hydrogencarbonate can make the stomachalkaline and trigger the production of even more acid. Metal hydroxidesare better alternatives because of being insoluble, these do not increasethe pH above neutrality. These treatments control only symptoms, andnot the cause. Therefore, with these metal salts, the patients cannot betreated easily. In advanced stages, ulcers become life threatening and itsonly treatment is removal of the affected part of the stomach.
Question 8
4 / -1

Carbon cannot reduce the oxides of sodium to sodium because:

A
\(\mathrm{Na}\) has less affinity for oxygen

B
\(\mathrm{Na}\) has more affinity for carbon than oxygen

C
\(\mathrm{Na}\) is non-reactive

D
\(\mathrm{Na}\) has more affinity for oxygen than carbon

Solution

The metals high up in the activity series are very reactive. They cannot obtain by reduction of their oxides by carbon. Since, sodium\(\mathrm{Na}\) is high up in the acitivity series, carbon cannot reduce the oxides of sodium because it has more affinity for oxygen than carbon.
Question 9
4 / -1

One mole of N₂H₄loses ten moles of electrons to form a new compound A. Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in A? (There is no change in the oxidation state of hydrogen.)

A
-1

B
-3

C
+3

D
+5

Solution

First to find oxidation number of Nitrogen in N₂H₄

Oxidation number of H = +1

Let oxidation number of nitrogen be x

⇒2x + 4(1) = 0

⇒2x = -4

⇒x = -2

Each nitrogen atom has a -2 oxidation number. So taken both nitrogen atoms into the account gives oxidation number -4.

Change in oxidation number of nitrogen on losing 10 mol of electrons (considering no change in oxidation number of hydrogen atoms)

⇒-4 – (-10) = +6

Therefore, the oxidation number of 2 nitrogen atoms in compound Y is +6. Hence, the oxidation number of each nitrogen atom will be +3 in the new compound Y.
Question 10
4 / -1

Higher alkanes on heating to higher temperature decompose into lower alkanes, this process is known as:

A
Pyrolysis

B
Eectrolysis

C
Wurtz Reaction

D
None of the above

Solution

Higher alkanes on heating to higher temperature decompose into lower alkanes, this process is known as Pyrolysis.

Applying heat when a compound is decomposed, the process is known as pyrolysis. This process when applied to alkane is known as cracking.The breaking of larger alkanes into a mixture of low molecular weight alkanes, alkenes and hydrogen is known as cracking.

\(\ce{2 CH_{3} - CH_{3} \stackrel{500^{\circ} C }{\rightarrow} CH_{2}= CH _{2}+2 CH_{4} +2 H_{2}}\)

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Chemistry Test-9

Result

Chemistry Test-9

Score

-

Rank

-

SHARING IS CARING

Question 1

Aspirin

Alkaloid codeine

Morphine

Chloroform

Solution

Question 2

\(\ce{CH2=CH2}\)

\(\ce{CH3-CH3}\)

\(\ce{CH2=CHOH}\)

None of the above

Solution

Question 3

\(1 6^{\text {th }}\)

\(1 8^{\text {th }}\)

\(1 ^{\text {th }}\)

\(1 7^{\text {th }}\)

Solution

Question 4

Hydrogen gas and iron chloride are produced

Chlorine gas and iron hydroxide are produced

No reaction takes place

Iron salt and water are produced

Solution

Question 5

Starch

Rubber

Proteins

Nucleic acids

Solution

Question 6

Greenhouse effect

Reaction related to depletion of ozone layer

Photosynthetic reactions in plants

Reduction in the use and production of hazardous chemicals

Solution

Question 7

Over production of acid in the stomach causes irritation and pain.

With metal hydroxides salts, the patients can betreated easily.

Excessive hydrogen carbonatecan make the stomachalkaline and trigger the production of even more acid.

With metal salts, the patients cannot betreated easily as insevere cases, ulcers are developed in the stomach because of them.

Solution

Question 8

\(\mathrm{Na}\) has less affinity for oxygen

\(\mathrm{Na}\) has more affinity for carbon than oxygen

\(\mathrm{Na}\) is non-reactive

\(\mathrm{Na}\) has more affinity for oxygen than carbon

Solution

Question 9

-1

-3

+3

+5

Solution

Question 10

Pyrolysis

Eectrolysis

Wurtz Reaction

None of the above

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.