Description : A boy accidently splashes a few drops of `conc. H_2 SO_4` on his cotton shirt and splashed part blackens and holes appears. This is because the sulphu
Last Answer : A boy accidently splashes a few drops of `conc. H_2 SO_4` on his cotton shirt and splashed ... cotton D. Removes the elements of water from cotton
Description : `B_(3)^(3-)+Conc.H_(2)SO_(4)+CH_(3)-CH_(2)-OH overset(ignite)rarr(A)` What is the oxidation number of central atom that is responsible for green flame
Last Answer : `B_(3)^(3-)+Conc.H_(2)SO_(4)+CH_(3)-CH_(2)-OH overset(ignite)rarr(A)` What is the ... atom that is responsible for green flame in compound `(A)`?
Description : A compound X' on heating with excess conc. sulphuric acid at 443 K gives an unsaturated compound Y'. X' also reacts with sodium metal to evolve a colourless gas Z'. Identify X', Y' ... the chemical reaction of formation of Y' and also write the role of sulphuric acid in the reaction. -Science
Last Answer : X-Ethanol/ (C2H5OH)/Ethyl AlcoholY- Ethene / (C2H4)Z- Hydrogen/ (H2)Role of sulphuric acid - dehydrating agent
Description : When sodium burns; what is the colour of the flame?
Last Answer : Golden yellow
Description : I'm by nature solitary, scarred by spear and wounded by sword, weary of battle. I frequently see the face of war, and fight hateful enemies; yet I hold no hope of help being brought to me in the ... wounds gape wider and wider; death blows are dealt to me by day and by night.What am I? -Riddles
Last Answer : A shield.
Description : `underset(OH^(Ɵ))overset("Conc.")rarr` Incorrect statement (s) reagarding the reaction is/are:
Last Answer : `underset(OH^(Ɵ))overset("Conc.")rarr` Incorrect statement (s) reagarding the reaction is/are: ... . D. Reaction is an example of redox reaction
Description : what is the benefit of using fertiber sodium borate 15.0% B in plants as feterlizer.
Last Answer : Need Answer
Description : Give the formula of Borax. Borax is chemically called as. Borax Na2B4O7 10H2O is chemically called as hydrated sodium tetra borate
Last Answer : Garnet is the ore of which element. Give its chemical formula. Garnet is Silicate ore of Aluminium (MgFe) 3 AlSi3O2.
Description : Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc? (A) Sodium silicate (B) Sodium borate (C) Sodium tripolyphosphate (STPP) (D) Caustic soda
Last Answer : (B) Sodium borate
Description : Which of the following reactants on reaction with conc. NaOH followed by acidification gives following lactone as the product?
Last Answer : Which of the following reactants on reaction with conc. NaOH followed by acidification gives following lactone as the product? A. B. C. D.
Description : Assertion (A): Diethyl ether reacts with hot Conc `H_(2)SO_(4)` and gives ethyl hydrogen sulphate Reason (R): The reaction involves cleavage of C-O bo
Last Answer : Assertion (A): Diethyl ether reacts with hot Conc `H_(2)SO_(4)` and gives ethyl hydrogen sulphate Reason (R ... R is false D. A is false but R is true
Description : `Ph - underset(OH) underset(|)overset(CH_(3))overset(|)(C) - underset(OH) underset(|)overset(Ph)overset(|)(C) - Ph underset(H_(2)SO_(4))overset("Conc"
Last Answer : `Ph - underset(OH) underset(|)overset(CH_(3))overset(|)(C) - underset(OH) underset(|)overset(Ph)overset(| ... ) - underset(O)underset(||)(C) - CH_(3)`
Description : looks like ivy, but has heart shape leaves dark green centers, and edged in cream. What is it?
Last Answer : Could be a variegated wild Ivy..........depends if it is growing around trees.....that could endanger the tree........or do you want to keep it...............or get rid of it before it becomes invasive.
Description : In a house, there lives a family of 4. There is a father, a mother, an older sister, and a younger sister. One day, the father catches a disease. A week later, Death comes to take the ... will live until this candle burns out.' And Death agrees. However, Death never returns. Why not? -Riddles
Last Answer : The younger sister blew out the candle, so it didn't technically burn out. Then she threw away the candle so the family wouldn't mistakenly light it.
Description : Which metal burns to produce bright yellow flame ?
Last Answer : Burning sodium produces a bright yellow flame.
Description : A coal having high amount of volatile matter (A) Would require smaller combustion chamber (B) Produces very little of tar and gas on carbonisation (C) Ignites easily and burns with long smoky flame (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Blast furnace gas burns with a bluish flame, because of the presence of (A) CO (B) CH4 (C) CO2 (D) S
Last Answer : (A) CO
Description : Anthracite coal (A) Contains more volatile matter than bituminous coal (B) Ignites more easily than bituminous coal (C) Is essentially a coking coal (D) Burns with short, bluish, yellow-tipped flame producing very little smoke
Last Answer : (D) Burns with short, bluish, yellow-tipped flame producing very little smoke
Description : Lignite is (A) A high rank coal (B) A coking coal (C) Can be used for gasification and steam generation (D) A black banded coal which burns with a non-smoky yellowish flame
Last Answer : (C) Can be used for gasification and steam generation
Description : Cannel coal (A) Is non-coking (B) Has a high volatile matter content and burns with a luminous smoky flame (C) Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named (D) All (A), (B) and (C
Last Answer : (D) All (A), (B) and (C
Description : Coke oven gas burns with a yellowish flame, because of the presence of (A) CO2 (B) CH4 (C) H2 (D) NH3
Last Answer : (B) CH4
Description : Bituminous coal (A) Ignites less easily than anthracite (B) Is generally coking (C) Burns with smoky yellow flame (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : An alkene (A) `C_(16)H_(16)` on ozonolysis gives only one product (B) `C_8H_8O`. Compound (B) on reaction with NaOH/`I_(2)` yeilds sodium benzoate. Co
Last Answer : An alkene (A) `C_(16)H_(16)` on ozonolysis gives only one product (B) `C_8H_8O`. Compound (B) ... `(H_(2)//Pd-C)` gives a racemic mixture
Description : White crystalline solid (A) reacts with `H_2` to form a highly associated liquid (B) and a monoatomic , colourless gas (C ). The liquid (B) is used fo
Last Answer : White crystalline solid (A) reacts with `H_2` to form a highly associated liquid (B) and a ... has only unpaired electron in `pi` molecular orbital.
Last Answer : White crystalline solid (A) reacts with `H_2` to form a highly associated liquid (B) and a ... metallic bonds D. ionic, covalent and Hydrogen bonds
Last Answer : White crystalline solid (A) reacts with `H_2` to form a highly associated liquid (B) and a monoatomic , colourless gas ... 3)d` D. V - shape, `sp^(3)`
Description : A green coloured solid compound ̳X , gets oxidized to reddish brown solid in presence of air. ̳X on heating gives brown coloured solid ̳Y and two pungent smelling gases ̳A and ̳B . ̳A turns acidified potassium ... , SO 3 , decomposition (d) FeSO 4 , Fe 2 O 3 , SO 3 , SO 2 , decomposition
Last Answer : (c) FeSO 4 , Fe 2 O 3, SO 2 , SO 3 , decomposition
Description : Phenol on treatment with conc. `HNO_(3)` gives
Last Answer : Phenol on treatment with conc. `HNO_(3)` gives A. picric acid B. o-and m-nitrophenols C. cresol D. resorcinol
Description : Anisole with conc. `HNO_(3)` and conc. `H_(2)SO_(4)` gives
Last Answer : Anisole with conc. `HNO_(3)` and conc. `H_(2)SO_(4)` gives A. Phenol B. Nitrobenzene C. O - and - P - Nitroanisole D. O- Nitroanisole
Description : One mole of diethyl ether on heating with conc. HI gives
Last Answer : One mole of diethyl ether on heating with conc. HI gives A. 1 mole of `C_(2)H_(5)I` and 1 ... Iodoethane and ethonol but not in a `1:1` mole ratio
Description : Give the test that is used to detect borate radical is qualitative analysis.
Last Answer : Give the test that is used to detect borate radical is qualitative analysis.
Description : Is borate polar and 61504?
Last Answer : What is the answer ?
Description : The chemical substance present in bones and teeth is - (1) Calcium phosphate (2) Calcium chloride (3) Calcium sulphate (4) Calcium borate
Last Answer : (1) Calcium phosphate Explanation: Seventy percent of bone consists of hydroxyapatite, a calcium phosphate mineral (known as bone mineral). Tooth enamel is composed of almost ninety percent hydroxylapatite.
Last Answer : (1) Calcium phosphate Explanation: Seventy percent of bone consists of hydroxyapatite, a calcium phosphate mineral. (known as bone mineral). Tooth enamel is composed of almost ninety percent hydroxylapatite.
Description : The chemical substance present in bones and teeth is (1) Calcium phosphate (2) Calcium chloride (3) Calcium sulphate (4) Calcium borate
Last Answer : Calcium phosphate
Description : When a mixture of solid NaCl, solid `K_(2)Cr_(2)O_(7)` is heated with conc. `H_(2)SO_(4)` orange red vapours are obtained. These are of the compound
Last Answer : When a mixture of solid NaCl, solid `K_(2)Cr_(2)O_(7)` is heated with conc. `H_(2 ... B. chromyl chloride C. chromic chloride D. chromic sulphate
Description : 0.257g of organic substance was heated with conc. sulphuric acid and then distilled with excess of strong alkali .the ammonia gas evolved was absorbed in 50ml of .1M HCl which required 23.2ml of c for neutralization at the end of the process. Determine the % of nitrogen in the compound ?
Last Answer : A. Vol of 0 .1M HCl taken = 50ml Vol of .1MNaOH used for neutralization of unused acid=23.2ml Now, 23.2 ml of .1MNaOH =23.2ml of .1MHCl Vol of .1MHCl unused=23.2ml Vol of .1MHCl required ... NH3 solution contain nitrogen = 14*26.8/10*1000 Percentage of Nitrogen=14*26.8*100/10*1000*.257 =14.6%
Description : How many of the following carbonyl compound will give two products after reaction with `NH_(2)OH` :
Last Answer : How many of the following carbonyl compound will give two products after reaction with `NH_(2)OH` :
Description : Which of the following carbonyl compound will give two products after reaction with `NH_(2)OH`:
Last Answer : Which of the following carbonyl compound will give two products after reaction with `NH_(2)OH`:
Description : Compound (A), `C_(10)H_(12)O` gives off hydrogen on treatment with sodium metal and decolourises `Br_(2)` in `C Cl_(4)` to give (B), `C_(10)H_(12)OBr`
Last Answer : Compound (A), `C_(10)H_(12)O` gives off hydrogen on treatment with sodium metal and ... pairs of diasteereomers D. A has 2 chiral centres
Description : A compound reacts with sodium and liberates hydrogen and on oxidation gives ketone. The formula of the compound could be
Last Answer : A compound reacts with sodium and liberates hydrogen and on oxidation gives ketone. The formula of the compound could ... `CH_(3)CH_(2)CH_(2)CH_(2)OH`
Description : A particular coal is said to be free burning when it (A) Burns completely (B) Gives smokeless burning (C) Shows little or no fusing action (D) None of these
Last Answer : (C) Shows little or no fusing action
Description : How much of the pie do you cover with tin foil if using a lattice edged crust?
Last Answer : I’ve always left my pies uncovered and they’ve turned out well. I’ve never tried covering them with tin foil.
Description : why are my plumeria leaves edged in red?
Description : I cut through evil like a double edged sword, And chaos flees at my approach. Balance I single-handedly upraise, Through battles fought with heart and mind, Instead of with my gaze.What am I? -Riddles
Last Answer : I am justice!
Description : What are gilt-edged securities? (1) Securities issued by the multinational companies. (2) Securities issued by the Government (3) Securities issued by the private sector (4) Securities issued by the joint venture companies
Last Answer : (2) Securities issued by the Government Explanation: Gilt-edged securities are bonds issued by governments. They are government securities, i.e., instruments issued by the government to borrow money from the market. Gilt-edged securities are a high-grade investment with very low risk.