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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
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1. Choose correct option. ...................... is a gland which is bothexocrine and endocrine.a. Sebaceous b. Mammaryc. Pancreas d. Pituitary |
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Answer» pitutary GLAND because it have both PROPERTIES |
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| 2. |
Q) Volume of one molecule of oxygen gas at S.T.P. is |
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Answer» 16 (O2) please mark me as the Brainliest ANSWER:-) |
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| 3. |
If energy required for the ionization of 0.2 g atom of Na atom is x kJ then the energy required (in kJ) to ionize 2.3g of Na atom |
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Answer» Answer ⇒ 11.5x kJ. Explanation ⇒ IONIZATION means converting the SODIUM atom into isolated GASEOUS ion. For 0.2 gm of the Sodium atom, AMOUNT of energy released to convert it into isolated gaseous atom = x kJ. ∴ For 1 gm of the Sodium atom, amount of energy released to convert it into isolated gaseous atom = x/0.2 kJ. ∴ For 2.3 gm of the Sodium atom, amount of energy released to convert it into isolated gaseous atom = 2.3x/0.2 kJ = 11.5x kJ. Hence, energy released to convert sodium atom into isolated gaseou ion is 11.5x kJ. Hope it helps. |
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| 4. |
Arjun purchased 250 gm of glucose (C6H12O16) for Rs.40. Find the cost of glucose per mole. |
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Answer» Explanation: = 12*6 + 1*12 + 16*16 = 72 + 12+ 256 molar mass = 340 now, No. of moles : GIVEN mass/molar mass = 250/340 = 0.71 moles now we know that 0.71 moles cost 40 as we need to find cost of per mole the cost is 50 (approx) if find helpful please give me support by MARK it as BRANLIEST |
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| 6. |
silver metal does not combine easily with oxygen but silver jewellery tarnishes after some time, how? |
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Answer» Answer: Explanation: This is because when SILVER is EXPOSED to air, it reacts with sulphur COMPOUNDS in the air. It is this reaction with sulphur compounds in the air that cause the silver to TARNISH and not the reaction with oxygen. The silver forms a tarnish, which is a compound of the silver and sulphur-Ag2S. Read more on Brainly.in - brainly.in/question/553341#readmore |
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| 7. |
Calcium carbonate calcium oxide +carbon dioxide |
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Answer» when calcium CARBONATE is HEATED up then it GIVES calcium oxide + CARBON dioxide |
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| 8. |
Which liquid is uniformly dissolved with iol? |
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Answer» Answer: Kids learn about SOLUTIONS and dissolving in chemistry including interesting ... It is uniform, or HOMOGENEOUS, THROUGHOUT the MIXTURE; It is stable and ... An example of immiscible liquids is oil and WATER. |
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| 9. |
At constant temperature the pressure of 22.4dm^3 volume of an ideal gas was increased from 105kPa to 210kPa, New volume could be? |
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Answer» Answer: 11.2dm³. Explanation: P1*v1=p2*v2 105*22.4=210*v2 v2=11.2dm³. |
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| 10. |
The number of elliptical orbits excluding circular orbits inthe N-shell of an atom is |
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Answer» Answer: 3 Explanation: no. of ELLIPTICAL orbit=n-1 |
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| 11. |
Ethyl chloride react with alcoholic kcn |
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Answer» CH3CH2NC will be FORMED |
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| 12. |
लाइसोसोम+को+आत्मघाती+थैली+क्यों+कहते+हैं? |
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Answer» Explanation: |
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| 13. |
10 °c aur 25°c me kis temperature pe jal ka waspan adhik hota hai |
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Answer» Answer: 25°c PER because VAPORIZATION ~TEMPERATURE |
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| 15. |
About sliver metal and uses of sliver metal for eighth std |
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Answer» Answer: silver metal is used in ornaments and JEWELLERIES as a decorative product silver metal is ALSO included in mirrors silver metal is also included in the REACTIONS in chemical study |
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| 16. |
Electrolysis of water equation |
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Answer» Answer: H2O——— H2 +O2 When we PASS electric current or use electrolysis process in water it breaks the water molecules into there ORIGINAL FORM (Hydrogen and OXYGEN) |
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| 17. |
How iron is extracted by thermit process. |
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Answer» Answer: IRON is extracted from thermit REACTION by adding aluminum powder to it. The DISPLACEMENT reaction are highly exothermic The AMOUNT of heat is very large that the metals are produced in molten state. The aluminum act as a reducing AGENT. |
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| 19. |
Which of the following diffuse faster than others petrol,water,perfume,milk |
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| 20. |
Let m be the element of 13 group then say its sulphate |
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| 21. |
two moles of ideal gas is expanded reversibly from 4atm. to 3 atm at const temperature of 300k calculate work done ( ans -332) |
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Answer» Dear Student, ◆ Answer - W = -1435 J ● Explanation - # Given - P1 = 4 atm P2 = 3 atm T = 300 K # SOLUTION - Work DONE is calculated as - W = -2.303nRT.log(P1/P2) W = -2.303 × 2 × 8.314 × 300 × log(4/3) W = -11488 × 0.1249 W = -1435 J Therefore, -1435 J of work is done during process. Thanks dear... |
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| 22. |
3g of H2 react with 29.0 g of O2, to give water. Themaximum amount of H2O formed is(1) 32g(2) 7.30 g(3) 0.73 g(4) 27 g |
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Answer» Answer: |
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| 23. |
The number of molecules in 22.4 cm nitrogen gas at STPthe number of molecules in 22.4 centimetre Nitrogen gas at STP |
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Answer» Answer: 6.023×10^23 Explanation: 1 MOLE of any GAS OCCUPIES 22.4cc 1 mole of any gas has 6.023×10^23 |
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| 24. |
Proton esu full form |
Answer» PROTON ELECTROSTATIC unitMARK AS BRAINLIEST THANK IT FOLLOW ME BYE♡♡♡♡ |
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| 25. |
Calculate molecular mass of u NH3 |
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Answer» Answer: N = 14u H =. 1u There for molecular mass of NH3 is 14 +(1×3)=17u |
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| 26. |
what is the change in internal energy of one mole of monoatomic gas when temperature is increased by 200 degree Celsius adiabatically and reversibly ( ans -2.50 ) solve it |
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Answer» for ADIABATIC process, change in internal energy = where n is number of moles of gas, GIVEN, n = 1, ∆T = 200°C or, 200K [change in temperature in Celsius is same as Kelvin ] for monoatomic gas, Cv = 3R/2 , where R is UNIVERSAL gas constant.i.e., R = 25/3 J/mol.K now, change in internal energy = 1 × 3/2 × 25/3 × 200 J = 2500 J = 2.50 KJ |
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| 27. |
In the reaction 4A + 2B + 3C - A,B,C3,what will be the number of moles of productformed, starting from one mole of A, 0.6 moleof B and 0.72 mole of C ?(1) 0.25 (2) 0.3 (3) 0.24 (4) 2.32 |
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Answer» Answer: I CANT tell the answer Explanation: |
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| 28. |
Give any two examples of:1.gel2.sol3.emulsion |
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Answer» Here is the answer..!! All the BEST..!! PLEASE MARK me the BRAINLIEST !!! |
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| 30. |
Calculate the formal charge of sulphate ion |
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Answer» Answer: Sulphate ion has two FORMAL charges. |
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| 31. |
Materials are grouped together on the basis of what |
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| 32. |
Which of the following does not show hydrogen bonding?(1) N2O(2) H₂O(3) H2S(4) Fe304 |
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| 33. |
What is plasma and how it is form . |
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Answer» Brainlist... Explanation: Plasmas are MADE when some of the electrons in a gas break free, leaving BEHIND a positively charged nucleus called an ION. The negatively charged electrons and positively charged ions make it possible for the gas to conduct electricity |
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| 34. |
Pure hydrogen sulphide is store in a tank of 100 litre capacity at 20°C and 2 atm pressure. The mass of the gas will be |
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Answer» Answer: 26 kg Explanation: |
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| 35. |
The number of radial nodes for 3d orbital is |
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Answer» two radial NODES Explanation: there are FOUR nodes (5-1=4) and there are two angular nodes on the XZ and xy PLANES .This means there should be two radial nodes |
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| 36. |
How can Alkali be made from magnesium ribbon? |
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Answer» 2Mg + O2 ---> 2MgO Mg(OH)2 is alkali Mg is MAGNESIUM ribbon |
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| 38. |
write the structural formula of ester and also with ester formula write the structural formula of corresponding alcohol and acid |
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| 39. |
Are all double displacement reaction also precipitation reaction? |
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Answer» Answer: It is not necessary for all double displacement REACTION to be PRECIPITATION reaction because there are several such reaction in which one REACTANT is acid and other one is base. The acid reacts with base and form SALT which is found dissolved in water that is formed. |
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| 40. |
Identify the compound 'X' on the basis of the reaction given below. Write the name and chemical formula of 'A','B' and 'C'.a. 'X' +Zn --> 'A' + H2b. 'X' + HCI --> 'B'+ H-Oc. 'X'+ CH3COOH --> 'C'+H2O |
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Answer» a)H2so4+zn=znso4+h2 b) |
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| 41. |
A mixture containing 100 gm H, and 100 gm0, is ignited so that water is formed accordingto the reaction, 2H, +0, 21,0; How muchwater will be formed(1) 113 gm (2) 50 gm(3) 25 gm (4) 200 gm |
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Answer» answer is 4)200 |
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| 42. |
Give one example of each homogeneous mixture |
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Answer» Answer: Follow and brainlist Explanation: SOMETIMES, homogeneous mixtures are called SOLUTIONS. What are some examples of homogeneous mixtures? Liquid examples include pure water, white VINEGAR, sugar water, corn oil, and blood plasma. Surprisingly, homogeneous mixtures are not LIMITED to liquids, they can also be gases and SOLIDS. |
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| 43. |
Given one example of each element |
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Answer» HEY MATE... I CAN GIVE YOU EXAMPLES... BUT PROVIDE ME THE ELEMENT... |
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| 44. |
white crystalline compound on heating undergoes decomposition forming a brown coloured gas. The gas observed is acidic in nature which turns moist blue litmus paper to red. Identify the crystallin compound and the gas obtained. Also write a chemical equation and balance it. |
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Answer» The CRYSTALLINE compound is lead NITRATE and the GAS released in nitrogen dioxide. Reaction: 2Pb(NO3)2---------> 2PbO+O2+4NO2 |
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| 45. |
Vinay wants to check whether sugar cubes dissolve faster thanpowdered sugar, in water. To check this, he should note the time taken to dissolve ? Why ?A.5 g of sugar cubes and 10 g of powdered sugar in 100 ml of normal water each, separatelyB.5 g of sugar cubes and 5 g of powdered sugar in 100 ml of normal watereach, separatelyC.5g of sugar cubes in 100ml of warm water and 5 g of powdered sugar in 100 ml ofcold waterD(any of the above will work) |
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| 47. |
Palaster of parice ka arwac saurt kya hota hai |
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| 48. |
Action of phenolphthalein and methyl orange in acid base solution |
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Answer» PHENOLPHTHALEIN is an ALKALINE indicater |
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| 49. |
The number of electrons in 0.2 mol of Al3+ ion isIS |
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Answer» no. of ATOMS Al3+ = 0.2 × 6.022 × 10^23 So, no of ELECTRONS = 2 × 6.022 ×10^23 = 1.2044 × 10^24 e |
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| 50. |
Why is 100% H2SO4 not an acid? |
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Answer» Although 100% sulfuric acid can be made, this loses SO3 at the boiling point to produce 98.3% acid. The 98% grade is more stable for storage, making it the usual FORM for "CONCENTRATED" sulfuric acid. Other concentrations of sulfuric acid are USED for different purposes. ... 98%, concentrated (pH about 0.1. Hope it's help |
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