Haryana Board (HBSE) Class 11 Chemistry SAT-1 Question Paper 2024 PDF Download. SAT (Students Assessment Test). HBSE Class 11 Chemistry SAT Question Paper 2024. Haryana Board Class 11 Chemistry Students Assessment Test 2024. HBSE Class 11th Chemistry SAT 2024 Answer. Haryana Board Class 11 Students Assessment Test. Haryana Board Class 11 Chemistry SAT Paper 2024 Solution. हरियाणा बोर्ड कक्षा 11 रसायन विज्ञान SAT पेपर 2024.
HBSE Class 11 Chemistry SAT-1 Question Paper 2024 Answer Key
Instructions :
• All questions are compulsory.
• Questions (1-9) carry 1 mark each.
• Questions (10-12) carry 2 marks each.
• Questions (13-14) carry 3 marks each.
• Question (15) case study, carry 4 marks.
• Questions (16-17) carry 5 marks each.
1. The –ve charged particle is called :
(a) Anion
(b) Cation
(c) Atom
(d) Radicals
Answer – (a) Anion
2. Which of the following properties generally decreases along a period?
(a) Electron Affinity
(b) lonization Energy
(c) Valency
(d) Metallic Character
Answer – (d) Metallic Character
3. Which of the following property of water can be used to explain the spherical shape of rain droplets?
(a) Viscosity
(b) Surface tension
(c) Critical phenomena
(d) Pressure
Answer – (b) Surface tension
4. Temperature at which Celsius and Fahrenheit scale give the same reading :
(A) 40°
(B) –40°
(C) 27°
(D) None of above
Answer – (B) –40°
5. Enthalpy of reaction in an endothermic process is ……………..
Answer – positive
6. The hybridisation of B in BF3 molecule is ……………..
Answer – SP2
7. What is the value for the compressibility factor for ideal gas?
Answer : Z = 1
8. Name the type of system in which neither matter nor energy is exchanged with surroundings.
Answer – Isolated system
9. Assertion (A) : Smaller the size of an atom greater is the electronegativity.
Reason (R) : Electronegativity refers to the tendency of atom to share electrons with other atom.
Answer – Assertion (A) is true but reason (R) is false..
10. What is the oxidation number of Cl in KClO3.
Answer : Let oxidation number of Cl is x,
+ 1 + x + 3(–2) = 0
1 + x – 6 = 0
x = 5
11. Write Electronic Configuration of chromium atom.
Answer : 1s2 2s2 2p6 3s2 3p6 4s1 3d5
12. What is the reason that the first lonization energy of Nitrogen is higher while that of oxygen is lower?
Answer – Because nitrogen is more stable due to its half-filled electronic configuration.
13. What is the relation between Molecular formula and empirical formula?
Answer : Molecular Formula = n × Empirical Formula
MF = n × EF
Where n = Molar mass / Empirical formula mass
14. A measured temperature on the Farenheit scale is 200°F. What will this reading be on Celsius?
Answer – Relationship between Fahrenheit scale & Celsius scale is given by :
F = 9/5 C + 32
C = 5/9 × (F – 32)
C = 5/9 × (200 – 32)
C = 5/9 × 168 = 93.3
Thus, the temperature is 93.3°C
15. CASE STUDY : Modern periodic table arranges the elements in the increasing order of atomic number. It has 18 groups and 7 periods. Atomic numbers are consecutive in a period and increases in the group in a pattern. Elements are divided into four blocks, s-block, p-block, d-block, and f-block based on their electronic configuration. 78% of elements are metals, about 20 elements are non-metals, and few elements like B, Si, Ge, As are metalloids. Metallic character increases down the group but decreases along the period from left to right. The physical and chemical properties vary periodically with their atomic numbers. Periodic trends are observed in atomic size, ionization enthalpies, electron gain enthalpies, electronegativity, and valence. Oxides of metals are basic, some are amphoteric. Non-metals form acidic oxides, some form neutral oxides. s-block elements are soft, highly reactive, do not show variable oxidation states. p-block elements are metals, non-metals as well as metalloids, show variable oxidation states, exist as solids, liquids, and gases. d-block elements are metals, form coloured ions, show variable oxidation states, have high melting and boiling points. Lanthanoids and actinoids are f-block elements, form coloured ions. All actinoids are radioactive.
Questions :
(a) Name the elements which belong to the d-block but are not transition metals.
Answer – Zn, Cd, Hg
(b) What are representative elements?
Answer : s-block and p-block elements are called representative elements.
(c) Which group elements are most electropositive and why?
Answer – Group 1 elements are most electropositive due to the largest atomic size and lowest ionization enthalpies in respective periods.
(d) What happens to reactivity, if you move down the group 17?
Answer – Reactivity will decrease when moving down the group 17.
16. Which experiment led to the discovery of electrons and how?
Answer – The cathode ray discharge tube experiment performed by J.J. Thomson led to the discovery of negatively charged particles called electrons. A cathode ray tube consists of two thin pieces of metals called electrodes sealed inside a glass tube with sealed ends. The glass tube is attached to a vacuum pump and the pressure inside the tube is reduced to 0.01 mm. When fairly high voltage (10,000V) is applied across the electrodes, invisible rays are emitted from the cathode called cathode rays. Analysis of these rays led to the discovery of electrons.
17. Distinguish between Carbocation and Carbanion.
Answer –
| Carbocation | Carbanion |
| 1. The ion which contains the positive charge on Carbon atom is called Carbocation. | 1. The ion which contains the negative charge on the Carbon atom is called Carbanion. |
| 2. The hybridization of carbocation is sp2. | 2. The hybridization of carbanion is sp3. |
| 3. The geometry of Carbon in carbocation is trigonal planar. | 3. The geometry of Carbon in carbanion is pyramidal. |
| 4. In any chemical reaction, they act as electrophiles. | 4. In any chemical reaction, they act as nucleophile. |
| 5. Example, CH3+ | 5. Example, CH5– |