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Q. No.The atomic number of the element with the lowest first ionization enthalpy is:
1. \(32\)
2. \(19\)
3. \(35\)
4. \(87\)
1. \(32\)
2. \(19\)
3. \(35\)
4. \(87\)
Subtopic: Physical Properties |
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Which of the following option contains the correct decreasing order of hydration energy of the following ions?
K+, Mg2+, Cs+, Ca2+, Rb+
K+, Mg2+, Cs+, Ca2+, Rb+
| 1. | Mg2+ > Ca2+ > K+ > Rb+ > Cs+ |
| 2. | Ca2+ > Mg2+ > Cs+ > Rb+ > K+ |
| 3. | Mg2+ > Ca2+ > Cs+ > Rb+ > K+ |
| 4. | Cs+ > Rb+ > K+ > Ca2+ > Mg2+ |
Subtopic: Chemical Properties |
84%
Level 1: 80%+
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Which of the following option contains the correct match:
1. A – P, B – Q, C – S, D – R
2. A – Q, B – P, C – S, D – R
3. A – R, B – S, C – P, D – Q
4. A – S, B – R, C – Q, D – P
| Table – I (Elements) | Table – II (Flame colour) | ||
| A. | K | P. | Violet |
| B. | Ca | Q. | Brick Red |
| C. | Sr | R. | Apple Green |
| D. | Ba | S. | Crimson Red |
1. A – P, B – Q, C – S, D – R
2. A – Q, B – P, C – S, D – R
3. A – R, B – S, C – P, D – Q
4. A – S, B – R, C – Q, D – P
Subtopic: Physical Properties |
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Consider the following reaction given below:
\(\mathrm{BeO}+\mathrm{HF}+\mathrm{NH}_3 \rightarrow \mathrm{A} \stackrel{\Delta}{\rightarrow} \mathrm{BeF}_2+\left(\mathrm{NH}_4\right) \mathrm{F} \)
The missing compound A is-
1. \(\mathrm{Be}(\mathrm{OH})_2 \)
2. \(\left(\mathrm{NH}_4\right)_2\left(\mathrm{BeF}_4\right) \)
3. \(\left(\mathrm{NH}_4\right)_2\left(\mathrm{BeF}_3\right) \)
4. \(\left(\mathrm{NH}_4\right)_2\left(\mathrm{BeF}_6\right) \)
\(\mathrm{BeO}+\mathrm{HF}+\mathrm{NH}_3 \rightarrow \mathrm{A} \stackrel{\Delta}{\rightarrow} \mathrm{BeF}_2+\left(\mathrm{NH}_4\right) \mathrm{F} \)
The missing compound A is-
1. \(\mathrm{Be}(\mathrm{OH})_2 \)
2. \(\left(\mathrm{NH}_4\right)_2\left(\mathrm{BeF}_4\right) \)
3. \(\left(\mathrm{NH}_4\right)_2\left(\mathrm{BeF}_3\right) \)
4. \(\left(\mathrm{NH}_4\right)_2\left(\mathrm{BeF}_6\right) \)
Subtopic: Chemical Properties |
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Match the compounds given in List–II with the compounds which are present in List–I
1. A – P, B – Q, C – R, D – S.
2. A – R, B – S, C – Q, D – P.
3. A – R, B – S, C – P, D – Q.
4. A – P, B – Q, C – S, D – R.
| List -I | List-II | ||
| A. | Soda Ash | P. | \(NaF\) |
| B. | Chlorophyll | Q. | \(Ca(OH)_2 \) |
| C. | White washing | R. | \(Na_2CO_3 \) |
| D. | Tooth paste | S. | \(Mg^{2+}\) ions |
1. A – P, B – Q, C – R, D – S.
2. A – R, B – S, C – Q, D – P.
3. A – R, B – S, C – P, D – Q.
4. A – P, B – Q, C – S, D – R.
Subtopic: Biological Importance of S Block Elements and & Its Ore |
78%
Level 2: 60%+
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Consider the following statements.
A: Beryllium oxide is an acidic oxide.
B: Beryllium sulphate is soluble in an aqueous medium.
C: Beryllium carbonate is thermally stable.
D: Beryllium shows anomalous behavior in comparison to other Group 2 elements.
The correct statements are:
1. A & B
2. B & C
3. B & D
4. C & D
A: Beryllium oxide is an acidic oxide.
B: Beryllium sulphate is soluble in an aqueous medium.
C: Beryllium carbonate is thermally stable.
D: Beryllium shows anomalous behavior in comparison to other Group 2 elements.
The correct statements are:
1. A & B
2. B & C
3. B & D
4. C & D
Subtopic: Reasoning Questions |
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The correct match among the following is:
1. A–S, B–Q, C–P, D–R
2. A–P, B–Q, C–R, D–S
3. A–S, B–P, C–Q, D–R
4. A–R, B–S, C–Q, D–P
| List - I | List - II | ||
| A. | Caustic soda | P. | CaSO4 |
| B. | Washing soda | Q. | Na2CO3. 10H2O |
| C. | Dead burnt plaster | R. | Ca(OH)2 |
| D. | Slaked lime | S. | NaOH |
1. A–S, B–Q, C–P, D–R
2. A–P, B–Q, C–R, D–S
3. A–S, B–P, C–Q, D–R
4. A–R, B–S, C–Q, D–P
Subtopic: Compounds of Ca and Na -Preparations, Properties & Uses |
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Assertion(A): Alkali metals shows characteristic colour in reducing flame.
Reason(R): They can be identified by flame test.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Reason(R): They can be identified by flame test.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Physical Properties |
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Subtopic: Physical Properties |
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Which one of the following is water soluble?
(a) BeSO4
(b) MgSO4
(c) CaSO4
(d) SrSO4
(e) BaSO4
1. Only a & b
2. Only a, b, c
3. Only d & e
4. Only a & e
(a) BeSO4
(b) MgSO4
(c) CaSO4
(d) SrSO4
(e) BaSO4
1. Only a & b
2. Only a, b, c
3. Only d & e
4. Only a & e
Subtopic: Reasoning Questions |
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