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Questions asked by meena.p
Questions
14353
questions
1
answer selected
The value for $\large\frac{1}{\alpha}+\frac{1}{\beta}$ when $\alpha$ and $\beta$ are the roots of the equation $25x^2-20x+2=0$ is
sat
math
quadratic-equations
asked
Aug 13, 2018
1
answer
The value of $p$ for the equation $x^2-4x+p=0$ which has a repeated root is
sat
math
quadratic-equations
asked
Aug 13, 2018
1
answer
The solution set for the equation $(x+2)(1-x)=-4$ is
sat
math
quadratic-equations
asked
Aug 13, 2018
1
answer
What is $f(g(x-2))$ if $f(x)=x^2-4$ and $g(x)=2x+3$ ?
sat
math
quadratic-equations
asked
Aug 13, 2018
1
answer
given $f(x)=x^2-4x+3$ , the ordered pair of $f(3)$ is
sat
math
quadratic-equations
asked
Aug 10, 2018
0
answers
The solution which is obtained after filtration is
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 10, 2018
1
answer
The solution of impure compound and solvent is concentrated to get
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 10, 2018
1
answer
At room temperature, the impure compound in crystallisation is
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 10, 2018
1
answer
Select the correct statement from the following options.
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 10, 2018
1
answer
The molar heat of vaporisation $(\Delta \;H_{vap})$ for water is
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 10, 2018
1
answer
An octahedral void is present at each edge of the FCC lattice. How much of each of these voids belong to each unit cell?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 10, 2018
1
answer
If N is the number of tetrahedral voids in a close-packed structure, then the number of octahedral voids is:
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 10, 2018
1
answer
The density of a solution prepared by dissolving $120 \;g$ of urea (mol.mass = 60 u) in 1000 g of water is 1.15 g/mL. The molarity of this solution is:
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 10, 2018
1
answer
The density $(in\; g\; mL^{–1})$ of a $3.60\; M$ sulphuric acid solution that is $29\%\; H_2SO_4$ (Molar mass =$ 98\; g\; mol^{–1})$ by mass will be:
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 10, 2018
1
answer
Calculate the molality of a solution containing $6.3$ grams of Oxalic acid crystals dissolved in $0.5$ kilograms of solvent. Molecular weight of Oxalic acid = 126 grams/mole.
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
What is the molality of a solution of $0.540\; M \;HCl$ present in $155\; ml$ of solution. The weight of the solute, water, is $0.150 \;kg.$
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
Co-ordination number of a crystalline solid is
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
The edge length of an FCC lattice is X times the atomic radius. Value of X is:
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
The void fraction is the ratio of unfilled volume to total volume of a structure. For ideal metallic FCC crystal, it is:
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
Number of particles in one unit cell of HCP lattice is:
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
With increase in temperature, which of these changes?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
Two solutions of a substance are mixed in the following manner. $480 \;ml $ of $1.5\;M$ First solution +$520\;ml\;of\;1.2 M$ second solution . What is the molarity of the final mixture?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
A solid of density d is dropped in a liquid of density D, if d>D then,
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
What is the molar concentration of a solution with 32 grams of $SO_2$ in 0.5 liter solution?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
What is the concentration of a solution with 10 grams of calcium in $1000\; m^{3}$ of water?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
Which of the following is not the unit of concentration?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
What is the mass fraction of 4 moles of Sodium in 8 moles of Hydrogen chloride?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
How many atoms of carbon represent 1.5 mole?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
Which of the following is heat required in phase transitions?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
A solution has $25\%$ w/w solution of Sodium Chloride in 10 grams of water what is the mole fraction of Sodium Chloride?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
If the mole fraction of 4.5 moles of solute is 0.5, what is the number of moles of solvent?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
What is the mole fraction of sodium with moles n in a solution with moles of solvent N?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 9, 2018
1
answer
The vertex for the given graph is
sat
math
quadratic-equations
asked
Aug 8, 2018
1
answer
The product of two consecutive odd numbers is 255. Then the numbers are
sat
math
quadratic-equations
asked
Aug 8, 2018
1
answer
The coordinate points of the intersection of the graph with equation: $y=-x^2+4x-7$ and $y=5x-4$ are
sat
math
quadratic-equations
asked
Aug 8, 2018
1
answer
$y=2x^2+4x+5$ is equivalent to the equation
sat
math
quadratic-equations
asked
Aug 8, 2018
1
answer
The y -intercept of the graph $y=2x^2+6x-3$
sat
math
quadratic-equations
asked
Aug 8, 2018
1
answer
The axis of symmetry for the equation $y=ax^2+bx+c$ is
sat
math
quadratic-equations
asked
Aug 8, 2018
1
answer
The roots of a quadratic equation is $-2 \pm \sqrt{3}$. The equation they form is
sat
math
quadratic-equations
asked
Aug 8, 2018
1
answer
The discriminant value for the equation $6x^2-5x-6=0$ is
sat
math
quadratic-equations
asked
Aug 8, 2018
1
answer
The solution set for $3x+\large\frac{2}{x}$$=-7$ is
sat
math
quadratic-equations
asked
Aug 8, 2018
1
answer
$f(g(x))$ is , where $f(x) =5-x-x^2$ and $g(x)=(x+2)$
sat
math
quadratic-equations
asked
Aug 7, 2018
1
answer
Number of particles in one unit cell of HCP lattice is:
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 7, 2018
1
answer
Coordination number of HCP and FCC lattices respectively are
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 7, 2018
1
answer
The edge length of $NaCl$ unit cell is $500\; pm$. What is the density of $NaCl$ in $g/cm^3 ?$ [NA = 6.02 x 1023, Na = 23.0, Cl = 35.5 a.m.u.]
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 7, 2018
1
answer
Copper crystallises in face-centred cubic lattice and has a density of $8.930\; g\; mol^{-3}$ at 293 K. Calculate the edge length of unit cell. [At. mass of Cu = 63.5 a.m.u, Avogadro's constant NA = 6.02 x 1023].
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 7, 2018
1
answer
Crystallisation is based on the
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 7, 2018
1
answer
Which of the following is not a common method used for purification?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 7, 2018
1
answer
Calculate the molarity of a solution created by pouring $7.62\; grams$ of $MgCl_2$ into enough water to create 400 mL of solution.
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 7, 2018
1
answer
Calculate the molarity of a solution containing 100 gr of $NaCl\; (Mw = 58.5)$ in 1.5 liters of water.
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 7, 2018
1
answer
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